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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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1answer
385 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
41 views

No pressure in clutch after bleeding the system

I have a 1992 GMC C2500. When I got it there was no pressure at all in the clutch. I bleed it from the bleed valve for about 20 minutes to make sure there was no more air bubbles coming out. After all ...
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2answers
32 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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1answer
129 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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2answers
88 views

Oil change done wrong

So I recently took my 2011 GMC Terrain to get an oil change. My truck takes synthetic oil so oil changes are pretty pricey! It’s only been about 2 1/2 weeks since I gotten this oil change and since ...
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2answers
344 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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1answer
121 views

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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0answers
21 views

1997 gmc jimmy Car cranks but wont start

So we have a 1997 jimmy GMC that has been running very well for quite a while. One day suddenly the car would not start. We had a couple of friends look at it and they said it might be the fuel pump ...
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1answer
516 views

Airbag light blinking after ignition switch replacement

I am looking for some troubleshooting guidance on a 96 GMC Sierra C1500. I had to replace the ignition switch and now the airbag light on the dash blinks 7 times and stays on constantly. I checked ...
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0answers
595 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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1answer
28 views

instrument symbols for a 2008 GMC w5500

Just bought this truck but have no manual for it. Just wondering if anyone knows where I can get one, or information for a website where I could go to get information on symbol meanings for the ...
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2answers
12k 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 ...
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1answer
1k views

Sputtering and hesitation upon acceleration and intermittently

I have 98 GMC Sierra 1500 RWD with 4.3 L engine and automatic transmission. Have replaced the following within this year: distributor cap spark plugs and wires valve cover gaskets catalytic ...
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0answers
10 views

EPS and GMC steering wheel vibrations

I recently went and got a recall done for my EPS on my 2015 GMC Sierra 1500. When i got it back from the deal I had vibrations in my steering wheel. This recall was a flash update on the software for ...
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1answer
41 views

High Mileage GMC Yukon hybrid

What is considered high mileage on used Hybrid GMC Yukon? I am considering the purchase of a used Hybrid GMC Yukon or Chevrolet Tahoe. Is 125,000 high mileage for a Hybrid, like a standard gasoline ...
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1answer
48 views

Transmission is slow to engage

I have a 1988 GMC Sierra 4x4 truck, and I recently bought a rebuilt NV3500 transmission from a 1995 chevy truck (I picked this year, because from 1993 onward, this particular transmission used a ...
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1answer
62k 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 ...
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2answers
20k 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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0answers
47 views

Transmisson problems 2009 sierra 1500

I have a '09 GMC Sierra 5.3 rwd it has just under 80k miles. I was driving home and my truck felt like transmission wasnt accelerating pulled over and shut it off. Looking around trans fluid was all ...
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2answers
2k 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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1answer
104 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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1answer
82 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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0answers
98 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 ...
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0answers
43 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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5answers
98k 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 ...
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1answer
19 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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1answer
97 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
3k 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 ...
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3answers
75 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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0answers
33 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
627 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 ...
3
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1answer
954 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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3answers
232 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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2answers
79 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 ...
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2answers
51 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
28 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....
3
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1answer
174 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?
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1answer
6k 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
27 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.
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1answer
86 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 ...
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2answers
345 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 ...
4
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2answers
258 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 ...
5
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2answers
2k 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 ...
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1answer
367 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
2k 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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2answers
990 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 ...
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0answers
459 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
38 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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1answer
96 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
1k 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 ...