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Questions tagged [gmc]

A division of General Motors which produces trucks, buses, vans, and other large vehicles.

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2answers
16 views

I have a 2000 GMC Sierra 5.3L that won't start/run as of today

My truck has died on me 3 times today. When I put it in park and turn it off the doors don't unlock themselves. Then when I tried to start it up again nothing! No sounds, no lights. Then when I do get ...
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0answers
13 views

Coolant over flowing

On my 2002 GMC Denali, I’ve been having issues with the coolant fluid boiling out of the holding tank. The vehicle never overheated and was working fine after I replaced the fluid. About a month later ...
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0answers
22 views

Accessory coming on randomly and killing battery. GMC Canyon 2007

My 2007 GMC Canyon has had this problem for a couple months. All of the accessories turn on by itself after I have left the truck off and locked. I thought it was the ignition, because when I took the ...
2
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1answer
29 views

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 ...
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0answers
26 views

2000 Sierra 1500 4.8L Engine not revving properly for several minutes after start

For the past couple weeks I've been consistently having a weird issue with my 2000 Sierra 1500 4.8L when I first start it up. The engine will start and idle fine, but when I give it gas the engine ...
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1answer
17 views

Leaking at top of rear door

2006 GMC Siera Ext cab. I have a leak. water leaks in around the top of the left rear door. It appears to come down the rear door post. I have replaced the weather stripping and that didn't help. Any ...
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3answers
60 views

Part numbers for older GMC truck

I recently bought a 1982 GMC K1500 4x4 that I'm looking to restore. The truck body is in great shape but some of the mechanicals need work. I want to make it a daily driver, not a show truck. I'm ...
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1answer
60 views

Broken bolt in intake

I have a "2005" Canyon with a 3.5 I5,the other day I was putting the intake back on and broke a bolt in the intake,I think I have access to the broken bolt thru my wheel well. i have a good idea on ...
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0answers
32 views

No air-conditioning

If the AC was leaking and someone unhooked the AC unit, would that be causing the belt to squeak now? If so, what would you suggest?
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2answers
354 views

Tire rotation, and wheel alignment led to broken tire pressure sensor

I had my 2012 GMC Terrain serviced: Tire Rotation Brake System Flush Wheel Alignment Before taking the vehicle in, there were no outward signs (alerts, false-positives or otherwise) of any problems ...
2
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3answers
223 views

12V power disappears, inexplicably comes back when measuring voltage across battery terminals

Lately, my car has ocasionally had an issue where it completely goes black, no lights, no power windows, no cigarette lighter, and obviously no ability to start the engine; cant even get the solenoid ...
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0answers
38 views

6.0 L v8 shivering under 3000 rpm

I have a 6.0 L that shivers under 3000 rpm at slow acceleration but when flooring the gas it's gone but sometimes a black smoke comes out of the exhaust. 2006 Yukon Denali 3" custom exhaust Recent ...
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1answer
51 views

Repair oil leak in gmc truck

What do you recommend to stop oil leak on intake manifold in GMC 350 gasoline truck? Have used red forma gasket?
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1answer
62 views

What would cause the Reduced Power Warning Light to come on when engine is under stress, but then reset upon turning ignition off and back on?

We test drove our 2011 GMC Sierra Dually Diesel Crew Cab with 117,224 miles on it and immediately got a check engine light. Upon inspection, it was determined that the catalytic converter was bad. ...
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1answer
79 views

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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0answers
426 views

Clutch pedal won't go to the floor to engage neutral safety switch

This is a 1993 K1500 Sierra 4x4. I just replaced the clutch master and slave cylinders and bled the line. The clutch has pressure but it won't go all the way down to engage the neutral safety switch....
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2answers
620 views

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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2answers
41 views

1995 gmc Sierra 1500 [closed]

Since it snowed the water in my 95 gmc Sierra 1500 froze and cracked the block at the top and I went to fill the radiator up and everything just poured out on the side of the motor but you have to ...
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0answers
26 views

Rear brake problem

On my 1999 Savana GMC 2500: While on jacks, my rear wheels did no stop when I applied the brake. Chevy told me my ABS needed to be replaced. I went to the Junk yard, got a $100 module and installed it....
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1answer
268 views

2011 GMC Sierra 1500 low beams not working

The low beams on my 2011 GMC Sierra 1500 are not working. My high beams work in both switch positions. What is the simplest and cheapest way to fix this problem?
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1answer
3k views

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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0answers
45 views

97 GMC 5.7 LITER cranks on 7 cylinders

97 GMC 5.7 LITER checked/changed spark plugs and distributor cap. Starts on 7 cylinders but not 8. If you leave all 8 plugs connected doesn't crank, unplug #7, fires and cranks? I'm puzzled?!
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0answers
23 views

Truck only miss fires when it gets up to temp

07 GMC Sierra 1500 5.3 engine - it radom misfires after it warms up. I have changed 1 coil pack, map sensor, plugs, and wires. It only does it after warming up to temperature. What might be the issue.
3
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1answer
419 views

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 ...
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1answer
70 views

1994 GMC 6.5 Turbo Diesel

What would cause the turbo to boost in normal driving... no pulling a hill, no pulling a trailer, no load. Sometimes will boost going down a hill. details from OP comments below: The check engine ...
4
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2answers
255 views

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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2answers
86 views

Turn signal strangeness, and not just a burnt out bulb. 02 Safari Van

So for a couple weeks, I've had my right turn signals occasionally start blinking fast, but sometimes blinking at expected speed. Because I could see the light of my front-right signal reflecting on ...
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0answers
167 views

Is it okay to remove the catalytic converter and exhaust filter?

Can I remove the catalytic converter and exhaust filter from my 2008 GMC 3500 Duramax without having problems?
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1answer
139 views

What could cause ABS on 1 wheel when braking at slow speed?

I have 1999 GMC Sierra. There are no check engine lights on. The engine runs well and 4 wheel drive works well. When I brake when going slow (like 10MPH or less) sometimes the ABS engages causing ...
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2answers
1k views

Can driving through puddles damage your vehicle?

Was driving through puddles yesterday and got in shit from my dad telling me it could crack the headers on my truck. Just wondering if he is full of it or not.
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0answers
395 views

Speedometer doesn't work and transmission won't shift

I have a 95 GMC Sierra with a 4.3 V6 and automatic transmission. The speedometer doesn't work and will not shift on it's own. I have replaced trans fluid and filter(no shavings or anything abnormal ...
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2answers
37 views

98 GMC 1500 SLT ac electrical problem

I developed a leak in the high side Schraeder valve and the refrigerant got low enough that the compressor kept cycling on and off. I unplugged the compressor coil wire until I had time to fix the ...
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2answers
1k views

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 ...
5
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1answer
81 views

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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1answer
753 views

Grinding noise rear passenger side when braking at low speed

The rear brakes on my 2000 GMC Jimmy are disc brakes, not drums. I just changed the rear brake pads and rotors at 83,000 miles. The car is currently at 91,000. Grinding noise at low speed but the ...
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0answers
15 views

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
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1answer
571 views

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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1answer
511 views

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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2answers
2k views

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 ...
4
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1answer
433 views

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 ...
3
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0answers
79 views

1998 GMC Sierra: swap in V6 + 5spd manual into one with factory V8/auto

How much work and how many headaches would it be to pull a 4.3L V6 and 5spd manual trans from one 98 Sierra and swap it into a 2wd 1998 Sierra with a factory V8/auto? I've done my own repairs all my ...
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2answers
2k views

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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1answer
285 views

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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0answers
44 views

Electrical Issues 2001 GMC Sierra 5.3L

Vehicle is a 2001 GMC Sierra 1500 5.3L Automatic 2 wheel drive. The 10A fuse in position IGN0 keeps blowing when turning the key before engine cranks. When the fuse is blown, oil pressure and ...
2
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2answers
59 views

GMC Yukon leaking coolant. Wondering where to look

Loosing coolant. When I crank car it leaks a lot of coolant, but stops when driving. If I fill the reserve up I can't see it leaking anywhere. As soon as I put it in drive it leaks like a faucet for a ...
8
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1answer
171 views

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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0answers
76 views

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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2answers
12k views

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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1answer
221 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 ...
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2answers
6k 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 ...