20 Most Recent 2001 GMC Sierra Crew Cab Questions & Answers

On this website you find fuse box diagram, description and location for GMC Sierra (2001 - 2002) GMC Sierra mk1 2001 2002 fuse box diagram Auto Genius

Mostly there are no lights and no problems with bleeding abs brakes - the brake pedal has to be pumped full stroke after replacing brake pads or servicing the brakes and that doesn't usually cause problems though there are no absolute guarantees.

Security wires and sensor are in that general area, with the turn signal switch. Removing the turn signal switch doesn't bother the security part, it is on the other side of the column. But if some one jabbed a screw up in between the bezel to get it apart could have cut or broken a wire. Three wires from the ignition that are very small. You can pull on them and break them by hand. Could be other things, but since you had work done there, this is what I would check first.

if you don`t want to get a book that shows this then take pictures as your taking it apart so you know how to put it back together.

check your battery condition if this is good, probabley major short cirq.in power supply to rear window or bad ground

Check for power at the two headlamp fuses. If there is no power than try swapping the headlight relay. Let me know what you find I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

have the fault codes read as the cpu has found a fault detrimental to the engine

Find the horn icon on fuse box,. or owners manual diagram of fuses once you locate the horn fuse pull it out ! The horn will be disabled till you decide otherwise..

does it stay running with the boster cabels conected if so its likly your alternator

The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM or ECM,ECU), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.

No,changing the cluster will not change the mileage.

The pump relay is grounded by the computer, for 3 seconds when you crank the engine, and after the computer sees oil pressure or RPM. If the engine will not start the relay stops providing power after the first 3 seconds.You would check for the ground signal from the computer - most people either jumper the relay terminals or use another relay as a test.