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The normal way to test at the dealer or any other qualified repair shop would be to hook up a professional scan tool an check for coolant temp sensor data input , also to see if the PCM/ECM - engine computer can control ( turn on ) the cooling fans . Also check for codes . Three relays that are controlled by the engine computer are what turn on the fans . Watch this video
https://www.youtube.com/watch?v=Qn6jLSyqYA4

2006 GMC Sierra... | 36 views | 0 helpful votes


Pretty sure that is a problem with your EGR. Sometimes you can clean them, sometimes replace them. It may be a canister problem or something related to the EGR

GMC Cars &... | 23 views | 1 helpful votes


It means the unit isn't reading your CDs/DVDs. It most likely means the unit is broken and needs to be replaced. There is no fix that I know of for CD/DVD units, only replacing.

2008 GMC Acadia | 26 views | 0 helpful votes


I take help from online websites that have this service like helping in repair some like reliable-store have instant help.. others are a bit slow which I don't prefer... rest is up to u.. U can also get free manuals

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


Hi there's this website something like reliable-store and it is very amazing for manual for repairing servicing anything
someone on fixya recommended it to me and I thank him even today
They have full manuals and it's verrrrry cheap and mine
I got free in offers
3rd time I also had an issue with
the file so the girl replaced it in 30 mins
there is one more but i don't remember its name it was 2 years back bitman something link this
Try it out brother

GMC Cars &... | 39 views | 0 helpful votes


Check your dash area to see if a warning light is lit up or icon showing an open door saying door ajar.

GMC Cars &... | 20 views | 1 helpful votes


I would check you window washer reservoir pump and hoses.

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


Check light bulbs. They can be taken out with the holder from behind the bumper. They are ion the same fuse as the running lights so if they work, the fuse will be good.

GMC Yukon Cars &... | 19 views | 0 helpful votes


There is a fuse block in the rear of vehicle you should find a fuse labled EGM/DSM it's fuse number 23 a 10amp fuse and another labled EGM#2 fuse number 3 it's a 30amp fuse. These are power supply to the Endgate module...

GMC Cars &... | 136 views | 0 helpful votes


try laying on the ground and look at the bottom of the radiator

GMC Cars &... | 38 views | 2 helpful votes


i know few
error codes/ fault codes, wiring diagrams, schematic diagrams, torque specs, engine fo, switches functioning, assemble, disassembly, complete refurbish, repair, installation every single thing is covered
within seconds u can get the access and it's totally illustrative complete

GMC Envoy XL... | 28 views | 0 helpful votes


Removing front bumper is easy. Look under the bumper. There are bolts holding it to the frame. Unscrew these and bumper will come of lose. Screw new bumper same way you unscrew the old one. Remember don't titen screws right away. You have to adjust new bamper so visibly floats with fenders and front grill. Than titen up bolts.

GMC Sonoma Cars... | 50 views | 0 helpful votes


a repair shop NEAR you. If it is smoking and has overheated you HAVE a damaged engine. The more it is driven the worse it will be. Really you should probably get it towed to a shop. Most repair shops can work on it, all of them are going to make some $ off this, as probably minimally a blown head gasket, but likely rod or piston damage. Make sure the coolant is full before you try and drive it anywhere. treat it gently... maybe it will get to the shop under it's own steam if it is close. The only next step is engine seizure... and new engine time. (rebuilt dropped in might be $2000 if you're super lucky)

2007 GMC Yukon | 25 views | 0 helpful votes


you probably have a broken or disconnected wheel sensor

GMC Cars &... | 81 views | 0 helpful votes

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