Questions tagged [gmc]
A division of General Motors which produces trucks, buses, vans, and other large vehicles.
136
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Is an exhaust pipe broken at engine connection fixable by a DIYer?
I took my 1999 GMC Sierra 1500 w/5.3l to a transmission shop to have it replaced. The process requires disconnecting the exhaust pipes going into the engine to get access to the transmission. When the ...
- 307
10
votes
1
answer
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semi loud growling noise at all speeds
I have a 1998 GMC Sonoma SLS with a 4.3 l V6 Vortec.
It used to purr, now it growls, sounds like a small diesel engine. Vibration can be felt (mostly in the dead pedal) and also vibrates/growls in ...
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9
votes
0
answers
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Torque convertor shudder? [closed]
I drive a 2011 GMC Sierra 2500HD ex-cab 2wheel drive with a 6.0 gas engine and a six speed 6L90 automatic transmission. I have started noticing what I believe is called "shudder" from my tranny under ...
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8
votes
1
answer
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04 GMC Savanna G2500 4.8 V8 No Power
First time I looked at this the A/C compressor clutch wasn't engaging. Long story short: the high side pressure switch on the back of the compressor was unplugged. Noted that the engine was shaking (...
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My rpms are going high and my mph take a minute to go higher on my GMC Yukon
When I put my truck in drive and step on the gas the RPM's go up to 3,000 but my MPH will stay at 10-15
When I let go of the gas a little bit I can feel the truck kind of pull and the RPM's will go ...
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3
answers
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How do I fix my Heater & A/C in my car, suspect vacuum problem?
I didn't see this question asked after a search so I thought why not. I have a 97 GMC Sonoma with 90k miles that I barely drive. Since the hot summer is coming fast I went to use the AC and I am ...
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Coolant pouring out from under 1998 GMC Yukon as fast as i put in
I filled my radiator with water and it is pouring right back out of the rear of engine as fast as i fill. It seems to be near or behind the transmission.
https://youtu.be/27qV-ufMsQc
How can I find ...
7
votes
1
answer
805
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My car will not start after being driven fine
I have a 2003 gmc envoy xl it has been running fine..drove it all day. Went home 4 hrs later it will not start.. It acts like it is dead but everything from the lights to the heat works fine..I mean ...
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6
votes
2
answers
16k
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Why do you have to replace brake pads on both rear wheels at same time?
I have a 2002 GMC Yukon 1500XL. The right rear brake caliper went bad because of a torn rubber boot, which caused the brake pads on that wheel to wear out really quickly. I replaced the caliper, rotor ...
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2
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Driving in 3rd gear what will it do to the transmission
My daughter drove her pickup in 3rd gear on the highway. Will it damage the transmission?
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What does this symbol on my dash mean? GMC W4500
The light can be switched on or off by operation of the stem on the right of the steering wheel, the same control that operates the windshield wipers.
I can't detect any difference whether it is on ...
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Are automakers required to maintain spare parts infrastructure for 15 years?
Are (U.S.) automakers required to maintain an infrastructure of spare parts for 15-years (in the U.S. or in California)?
Reading about the GM EV-1:
The EV1's discontinuation ... to avoid potential ...
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6
votes
1
answer
469
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What is causing this slight vibration?
I have a 2004 GMC Envoy 4WD with a clean title, 54k miles. Very good condition. I recently purchased my second set of tires, Pirelli Scorpion ATRs. They are solid and quiet, but after changing them ...
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votes
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answers
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Random RPM jump when accelerating hard
I should state first off that I'm not much of a car guy when it comes to the actual mechanics behind them. I just wanted to check if there's anything going wrong with my transmission.
I drive a 03 ...
- 291
5
votes
2
answers
4k
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Truck overheating; no coolant flow through radiator
I have a 95 GMC Sierra 5.7 it suddenly overheated one day and the upper radiator hose busted. So far I've changed upper and lower hoses thermostat and water pump and flushed radiator. All new parts ...
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5
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1
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252
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Odd yellow electrical connector (GM)
I'm trying to pull an instrument panel in a 2000 GM Jimmy. There is this odd electrical connector I've never seen before. I can't squeeze the retention ramp to disconnect the thing. It has an odd ...
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Block Test: Can't suck any more air, is this normal? (1999 Suburban)
I performed a block test recently to diagnose a problem I'm having. The liquid stayed blue, but I want to clarify I have done this right. The purpose of the test was to see if I could prove a head ...
4
votes
2
answers
289
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What did I break and what do I need to replace?
My car slid and went over a center divider. I am very new to auto repair, but am wanting to learn and do it myself. Sadly, I am not very familiar with the parts so I can't really say what broke other ...
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4
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2
answers
8k
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Trouble rewiring O2 sensor harness after dogs ate it
This is a 2005 GMC Yukon 4x4 4.8 L.
Ok, dogs actually ate my harness going to Bank 2 Sensor 1 O2 sensor. The connector from the body side of the wiring is completely gone.
I found a connector I can ...
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4
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1
answer
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Correct placement of an aftermarket transmission cooler
I previously installed an aftermarket transmission cooler in a 2006 GMC Envoy (4.2, 4L60E). I installed it "after" the factory oil-water heat exchanger built into the radiator (that is, the ...
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4
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1
answer
227
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2015 GMC truck check engine light no longer on
Had my check engine light on. Put a code reader on it to see what it was. It went off on its own a few days later. Went to dealership and told them what the code reader said it was before it went ...
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4
votes
1
answer
969
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Truck won't budge in neutral. Could it be due to a cracked transmission bellhousing?
1997 GMC Sierra K1500 4x4 5.7L V8 Automatic Transmission (4l60e I believe)
I pushed my truck up my driveway with another truck. My truck was very hard to move, even in neutral and with the parking ...
- 41
4
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1
answer
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1998 GMC Suburban Air Conditioner
I am a part time auto mechanic, and for the life of me cannot figure out this problem. No matter how many times I fix it, two weeks later it comes back. I cannot fix the air conditioner. I have ...
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1
answer
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2003 Yukon XL 1500 5.3L Very rough, unstable idle on cold starts
When I say rough I mean like bad 70s carbureted motor rough. I've never seen an injected motor this rough during warm up. On the coldest days, it can even die out on me. The problem has only popped up ...
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2
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What is the correct/factory wiring for a Suburban 1998 battery/alternator?
I have included a picture showing what I have now on this Suburban. Note that there is wiring not shown in the picture which is a second electrical connection to the positive side of the battery ...
4
votes
1
answer
3k
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Where does a distributor gets it's power from?
I have a 1996 GMC K2500 Suburban with a 7.4 liter engine not getting power. Where does the distributor get it's power from?
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4
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1
answer
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2004 GMC Yukon Denali, intermittent no crank/no start/no noise
OK, it started doing this a few months back with no rhyme or reason. Before this happened, sometimes would start beeping after engine start. A long 18 beep procession. Don't know if related. When ...
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4
votes
1
answer
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1994 GMC Rally 3500 Low Beam out, High beam works intermittently
Low beam doesn't work. High beam will work, but cuts off and then on again. Also, if related, the switch must be jiggled for the interior dash lights to work. Could all of the problem be in the switch?...
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4
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1
answer
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Coolant leaking into engine
I had my truck in for service - 2006 Sierra Denali - due to an oil leak. They replaced the "engine oil cooler lines to pan gasket". Within a couple of days had a major issue - coolant had gotten into ...
4
votes
0
answers
165
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New LED 3rd brake light stops working
Swapped out LED taillights and third brake light on my '05 Sierra. Tail lights work fine but the third brake light will work when first plugged in but after a short while the cab lights don't work.
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4
votes
2
answers
764
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1999 jimmy with no heat in the cab
I have a 1999 gmc jimmy 4.3 L V6. I recently bought this truck and have had some minor problems with it but that is expected for the year. Lately the weather is starting to get colder. 0 Celsius over ...
- 41
3
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2
answers
161
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How do I determine whether this vehicle has a turbocharger?
This is a 1999 Suburban, which did not have any aftermarket turbocharger installed. So, the only way it could have been installed is from the factory. So, how do I find out whether it has one? What ...
3
votes
1
answer
1k
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2007 Yukon XL issues in four wheel drive
This truck is a nightmare. Every time we drive it, something breaks.
We had it in the shop about a month ago because all of the gas lines were rusted out and leaking. While it was there, they also ...
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3
votes
2
answers
14k
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Can I put 225/75R16 on a vehicle meant for 245/75R16?
I have a retired 2000 GMC Savanna 250 with 225/75R16 tires that have plenty of tread, no signs of dry rot, and are only 3 years old.
My newer vehicle is a 2009 Ford E350 extended, and it needs at ...
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3
votes
3
answers
193
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If the engine starts and keeps running, is my fuel pump okay?
I have an '06 GMC Canyon and I had it not starting in a parking lot last night. The starter was turning, but the engine would never actually turn over and start. There was an old timer that came by ...
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3
votes
2
answers
4k
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02' GMC Envoy. Engine KNOCK, not rod knock
I have a 2002 GMC Envoy.
Last year it developed a knocking that was at a very low volume but became louder in a 2 week span. After that it's been the same, it's louder when the engine starts cold and ...
3
votes
1
answer
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My Reverse Just Went Out/Everything Else Is Fine
I have a 2001 GMC 2500HD automatic 6.0 Vortec and the reverse just quit. All the other gears work fine. Where can I find a video that shows how to solve this?
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3
votes
2
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2003 Yukon 5.3 with 278,000
At 70 mph and about 2000 rpm, I have noticed that when i lightly press on the accelerator, the rpm will rise but speed will not increase. i press a little harder and the rpm will come back down to ...
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3
votes
2
answers
4k
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Van won't start and no lights come on; battery good
I have a 1992 GMC Vandura 2500 5.7L.
A few weeks ago, I tried to start it. All lights and radio came on but it wouldn't start. I tried again a week after that to show my dad but it still wouldn't ...
3
votes
1
answer
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Positive cable smoking......
I have a question. My truck has the battery next to the frame. Positive is almost impossible to get to. There is a positive red box in the engine to connect the positive jumper cable to. I had a dead ...
- 31
3
votes
1
answer
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How or where to determine/find the pinout for the Canyon ABS pump (545-00579)
I am trying to connect to an ABS pump taken from a 2012 GMC Canyon interchange part number: 545-00579. Since this is not an aftermarket part, ATE the manufacturer of the controller hasn't been ...
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3
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2
answers
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Z71 package details for old body style, late 1990s, GMC Sierra
For GMC Sierra pickup trucks back in the old-body style late 1990s (1996, 1997, 1998) (not the new-body-style and more recent from 1999 onwards), what features made up the Z71 package? I always ...
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3
votes
1
answer
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6L90 Transmission swap
I'm swapping out a worn out 6L90 transmission that has over 220k on it in a 2011 GMC 2500 HD with one that has 89k on it from an identical truck. Will it have to be reflashed or reprogrammed to work?
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3
votes
1
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Check engine light between 1300-1800 RPM
I have a 1995 gmc Sierra hd with the 6.5L turbo Diesel engine in it. I just recently bought it and when ever I hold around 1300-1800 rpm the check engine light comes on, when I take my foot off the ...
3
votes
1
answer
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Satellite Radio OEM location on an 2009 Acadia
Does anyone know how to get at the XM unit on an '09 GMC Acadia? I can see the unit. It's located on the inside of the trunk, above the rear, driver-side tire. However, there's a large, black piece ...
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3
votes
1
answer
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2008 GMC Yukon 5.3L engine vibration at low speeds with cylinder deactivation
I have a 2008 gmc yukon 5.3L that has developed an engine vibration at low speeds with cylinder deactivation like when coming to a stop. Does not vibrate while normal low speed cruising but when ...
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3
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0
answers
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No start on 2002 GMC Savanna 1500
When I try to start it it will not start I was told to push the gas and it doesn't do anything at all. I replaced the alternator and got a new battery. We have been having this problem for over a ...
3
votes
0
answers
96
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1987 GMC Sierra - Can't connect to OBD diagnostic connector
I own a 1987 GMC Sierra and it has an ECU, I took it to a workshop to see if I've any issues, when they tried to connect a diagnostic reader to the connector (underneath the steering wheel) they ...
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3
votes
0
answers
76
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Changed front brake pads on 06 GMC Z71, then the master cylinder and brake booster failed [closed]
I put new brake pads on the front of my 06 GMC Z71. After finishing, I noticed I didn't have any brakes. The peddle was spongy so I bled the brakes. And bled the brakes, and bled the brakes. I could ...
3
votes
2
answers
641
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2007 GMC Sierra Rod Assembly for the Spare Tire
We recently purchased a 2007 GMC Sierra and are looking for some details on the assembly for the spare tire. The truck did not come with the rod assembly for the spare tire and we were hoping to make ...
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