A division of General Motors which produces trucks.

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8
votes
0answers
55 views

Torque convertor shudder?

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 ...
7
votes
3answers
134 views

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 ...
7
votes
1answer
178 views

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
1answer
63 views

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 ...
7
votes
1answer
85 views

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 ...
6
votes
1answer
1k views

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 ...
6
votes
0answers
58 views

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 ...
5
votes
2answers
857 views

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 ...
5
votes
4answers
21k views

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 ...
4
votes
1answer
326 views

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 ...
4
votes
1answer
3k views

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 ...
4
votes
1answer
22 views

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?...
4
votes
2answers
4k views

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
1answer
249 views

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
1answer
167 views

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 ...
4
votes
1answer
246 views

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
0answers
29 views

1987 GMC Sierra

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 ...
3
votes
2answers
109 views

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
2answers
169 views

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 ...
3
votes
1answer
17 views

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 ...
3
votes
1answer
29 views

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?
3
votes
1answer
294 views

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
0answers
44 views

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
2answers
486 views

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 ...
2
votes
3answers
159 views

different tire ratios

I have a 2006 GMC Sierra 1500 extended cab 4x2. I have 4 extremely worn tires. We are traveling from Texas panhandle to Carlsbad NM so I need to replace them. The problem is I can only afford used ...
2
votes
2answers
1k views

Grey smoke when idling 1999 GMC Suburban, coolant system pressure loss

The most recent update is at the bottom. This looks interesting. The Smoke I'm confident the smoke is from burning oil. It's slightly blue, absolutely not white. If the engine is warm and I am ...
2
votes
2answers
1k views

Engine condensation causing no-start condition

I have a 2000 GMC Savanna, and I've had this problem twice. If we have a particularly cold few days, then a warm humid front moves through overnight, the engine won't start. I can see quite a bit of ...
2
votes
3answers
132 views

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 ...
2
votes
1answer
20 views

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 ...
2
votes
1answer
55 views

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 ...
2
votes
1answer
76 views

1987 GMC pickup - will not crank

I have a 87 GMC pickup. It was running fine yesterday. Went to get in it this morning and nothing. The cab light came on at first, but now nothing. When I hook jumper cables to it I get a spark from ...
2
votes
1answer
40 views

1996 gmc 3500 cube vanheater problems

1996 gmc 3500 cube van when heater fan is on and in cold position it blowes very hard but when you turn it to full heat it hardly blows at all?? what do I need to clean or fix
2
votes
1answer
230 views

Does starter replacement make sense in a heat sink situation?

Related to: Slow chugs from starter with warm engine but not cool engine? It seems that while the engine is running, it heats up the starter, and then it sounds like it is barely able to start. This ...
2
votes
1answer
205 views

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 ...
2
votes
0answers
53 views

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 ...
1
vote
3answers
60 views

I need to replace the female part that a headlight bulb fits into

I don't think the make/model matters here, but just in case, I own a 2009 GMC Acadia. My driver-side, low-beam headlight went out yesterday. I bought a replacement H11 bulb and began replacing the ...
1
vote
2answers
32 views

brakes wont bleed after replacing lines from mc back 98 gmc jimmy

98 gmc jimmy 4.3 liter. brake pedal to floor after ok previous day. eventually stops me although don't stop on dime. hubby replaced lines from mc back (rubber and metal) part of line. Tried to bleed ...
1
vote
2answers
26 views

Transmission Dip stick reading at Hot level [closed]

I just bought a 2000 GMC Jimmy with 170,012 miles on it. Is it normal that it is reading hot on the dip stick of the tranny fluid? yes this is after its been running for awhile.Also the previous owner ...
1
vote
1answer
167 views

Blocked windshield washer jet 96 Suburban K2500

The passenger side washer jet on my 96 GMC Suburban K2500 got something in it, and I can't figure out how to clear it. The tubing is buried somewhere inside the firewall and I can't find the end to ...
1
vote
1answer
23 views

1999 GMC Safari Shocks

I have a 1999 GMC Safari 2WD that has 160k on it. I need to replace the shocks on it. Does anyone know how to do this and have a recommendation on the type of shocks I should install? I only drive ...
1
vote
1answer
50 views

I have a 1993 GMC sierra 1500 and I have some questions about the grounding

When we bought the truck the original battery was grounded to the alternator and my dad told me I should remove the ground and put it to the frame. Well after we did that all of my gauges started ...
1
vote
1answer
51 views

Rims for my tires?

I have a 2001 GMC Sierra 1500 and have 16 GMC stock rims but was given a set BF Good rich all terrain 315/70R17 tires in almost perfect shape. Would like to buy 17 rims for them. How do I make sure ...
1
vote
0answers
26 views

Possible engine knock in 1995 GMC Jimmy

Hello I have a 1995 GMC Jimmy (Automatic & 4x4)and I have been working on it on and off for about a year and a half, i have fixed many things with it but there are couple things that I have not ...
1
vote
2answers
124 views

2001 GMC Jimmy wont start? [closed]

Hi I have a 2001 GMC Jimmy it was running fine, then parked it. it starting acting funny, sometimes would take a couple times to start, so checked my oil dipstick, it read a little high and smelt ...
1
vote
0answers
359 views

Car won't start but all power works [closed]

I have a 2005 GMC Envoy. It will not turnover or click but all power and lights work. I can hear the fuel pump kick in. When I turn the key nothing happens. I touched the starter with a screwdriver &...
0
votes
1answer
180 views

SD255 vs PMGR Starter - GMC 1998 Suburban

I plan to replace the starter on my Suburban. When I go to BuyAutoParts.com, and fill in the make/model/year http://www.buyautoparts.com/selectpart/1998_GMC/Suburban/Starter/30-0.html I get two ...
0
votes
0answers
26 views

Electronic Power Steering Conversion Kit for Box Trucks?

Are there any electric power steering conversion kits that will work for larger vehicles such as box trucks? Do larger vehicles need larger electric motors to help steer?