GMC Cars & Trucks - Recent Questions, Troubleshooting & Support

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)

Try disconnecting the battery for 15 min and see if it will reset.

Sounds like you might have a blown head gasket. You would have to remove both cylinder heads, send them to a machine shop to have them checked for cracks and warpage. Then reinstall with all new gaskets.

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...

located in the back . It's called the LGM fuse #2 (Lift Gate Module) The Lift Gate Module controls the defroster grid circuit.

There is no reset button if you mean like a fuel shut-off switch or fuel inertia switch. Only used by Ford as far as I know. I've never heard of one on a GM product.
The fuel pumps have been located in the gas tank since the beginning of fuel injection systems back in the 1980's. Some GM cars since about 2000 have a special access plate in the trunk area just above the gas tank, for fuel pump module removal. Previously, the only way to replace a fuel pump was to remove the tank from the vehicle. That is probably the case in your van, but check for an access plate in the floor, just above the fuel tank-just above the small opening in the tank where the pump is removed.

this sounds silly but have the auto store like advance check the starter, it's usually no charge for the test

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.

How many miles?

Does it have manual or automatic climate control system ? Vin C or K 4X4 or 2WD ? Heat shuts off ???? You mean the heater blower motor stops blowing air out of the vents ?

The reason the light is flashing constantly is because the vehicle is sensing that four wheel drive(4WD) is not working. These 4WD systems use vacuum from the engine to engage/disengage to front axle. The vehicle probably has no vacuum going to the front axle, which would not allow the 4WD shift to complete, which would then leave the light on the dash flashing.
First thing to check is that the vacuum actuator on the firewall is working as it should.

hello
u'd need a proper manual for this in my opinion
like there are plenty of dealers and online shops that deal in those..
you can get some free at reliable-store and it;s actually really illustrative

hope it helps.

All depends on what engine you have, but if you have a distributor it is at the base of the rotor mount inside of the cap.

Yes , disconnecting the battery will disable air bags . wait 10 min. after for the capacitors inside the air bag control module to dissipate charge .

I think you could use this manual method instead.. My nephew use it to repair my car and it's totally repaired now. Here's the website he bought it from. reliable-store

Remove the distributor cap while cranking, see if the rotor turn. If not then the distributor gear is worn (need to replace the gear).
The ignition module could defect. Need to check the ignition module for power and ground and a bypass signal at the module.

Hope it helps.

Hope it helps.