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I am not sure on this but I had one that did that and there is a fuse by the side of the dashboard that actually operates the transmission. Check all fuses first then try the box in motor compartment and check all those fuses including your relays. Thats just an easy start to what could be an easy fix.

GMC Cars &... | 20 views | 0 helpful votes


Do you have a code number? otherwise more commonly found when you have just reverse is a cracked cage in the transmission,the good thing is it is a cheap fix.

2005 GMC Envoy... | 32 views | 0 helpful votes


Your heater sensis the temperature in the cab and turns down the heat. adjust you climate control to med high or so. temp not fan it can still be set to high. Check your owners manual.

Mike.

Mike

GMC Cars &... | 35 views | 0 helpful votes


Does it have a fuel sock filter inside the tank? Might need a new fuel filter or new fuel hoses. Old hoses lose their shape under pressure and collapse.

GMC Cars &... | 22 views | 0 helpful votes


They are pretty easy to get to from the bottom if you have access to a lift.

GMC Cars &... | 32 views | 0 helpful votes


Need more information

GMC Cars &... | 26 views | 0 helpful votes


Check bulbs first / fuse / backup switch/neutral safety switch.

1994 GMC Sonoma | 26 views | 0 helpful votes


Some fixya user told me a website reliable-store it is very good.. I used it to repair my shredder it had some spark issue which wasn't easily fixed. you can go there and try

GMC Jimmy Cars &... | 28 views | 0 helpful votes


I got this free Pdf manual from reliable-store for free and I don't think Ive visited a mechanic or fixya for help for more than 3-4 times out of the 20 times I fixed the chipper in these 4 yearsmust try this bitman and reliable-store. Both are good

2014 GMC Terrain | 33 views | 0 helpful votes


I believe it is 4 if it is gas

GMC Cars &... | 26 views | 0 helpful votes


THE SERVICE AND REPAIR MANUAL WITH DIAGRAM WILL HELP YOU TO LOCATE AND FIX THE PROBLEM ON YOUR OWN AND YOU WILL GET THE MANUAL FROM THE GIVEN LINK https://toolsnyou.com

GMC Cars &... | 26 views | 0 helpful votes


Your car's fob can't be programmed like that .
Transmitter Programming
Important: Up to 4 transmitters can be programmed. Do not operate or program the transmitters in the vicinity of other vehicles that are in the keyless entry program mode. This prevents the programming of the transmitters to the incorrect vehicle. The order in which the transmitters are programmed is important. The first transmitter programmed will be transmitter #1, and the second transmitter programmed will be transmitter #2. Use care to program the transmitters correctly.
Important: All key fobs must be programmed each time any one fob is programmed. The scan tool must stay connected until all of the transmitters are programmed.
Install a scan tool and navigate to the BCM Module Setup menu.
Select Program Key Fobs.
Follow the scan tool on-screen directions.
When the programming operations have completed, operate the transmitter functions to verify correct system operation.

2004 GMC Canyon | 42 views | 0 helpful votes


Sounds like you need to replace all the spark plugs and dont foget to properly set the gap of the plug. Dont over tighten the spark plug. About a 1/4turn after contacting the head should be good for proper torque.It might even pay off to have a compression test done when the spark plugs are out.
Do these things before going further on your repair. Please let me know how things work out.

GMC Yukon Cars &... | 22 views | 0 helpful votes


Anti-theft problem ? Computer disables fuel injectors after a couple of seconds ,that's what it sounds like . Does it have a SECURITY light on ?

GMC Cars &... | 47 views | 1 helpful votes


Sounds like 3 different problems. The power door lock motor may be bad. Can you hear the motor trying to work? You will need to take of the door panel to test it and look for a bad connection. With the panel off, you can check to see if the switch is sending current to the motor. As for the rear door, It sounds like the manual linkage that locks and unlocks the door has come off. Again, with the door panel off you can test the window motor by giving it 12 volts.

GMC Cars &... | 73 views | 0 helpful votes


I got this free Pdf manual from reliable-store for free and I don't think Ive visited a mechanic or fixya for help for more than 3-4 times out of the 20 times I fixed the chipper in these 4 years

2013 GMC Acadia | 30 views | 0 helpful votes


hello
u will find a lot of wiring diagrams and circuit diagrams help books and stuff like this at reliable-store
the girl in the chat box can help u instantly... im a frequent buyer there since Im a mechanic so take help from there

GMC Cars &... | 31 views | 0 helpful votes

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