20 Most Recent 2007 GMC Sierra Classic Questions & Answers

Possible actuator motor issue have it tested.

More then likely the cable from the shift lock solenoid that unlocks the shifter is binding up or the shift lock solenoid is sticking..

just take the drive shaft out and replace all u-joints (3) and ur center support bearing (1) in all on my 2002 gmc sierra 2wd it was 50 dollars

Run your vin # and it will tell you what you have. Just go to search and put in vehicle resignation and should give you several different sites.

The security, antitheft or lock picture/icon is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. This link explains it pretty well. http://www.diy-gm-security.com/ Perform the re-learning procedure

1. Turn ON the ignition, with the engine OFF.
2. Attempt to start the engine, then release the key to ON (vehicle will not start).
3. Observe the SECURITY light, after approximately 10 minutes the light will turn OFF.
4. Turn OFF the ignition, and wait 10 seconds.
5. Repeat steps 1 through 4 two more times for a total of 3 cycles/30 minutes ( the vehicle
6. is now ready to relearn the Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK).

Important: The vehicle relearns Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle. Start the engine (the vehicle has now learned the Sensor Data Code and/or password).

witch fan

There are 3 motors mounted under the seat to move the postion of the seat, the cable for that motor maybe broken. Also check that the pivot points move freely and that there is nothing jammed in the seat tracks.

see this steps and think with clearly and logically NOT feared. God bless you Start with the compressor. Does it engage when you turn on the A/C? If so, the compressor is working and the A/C system probably contains enough refrigerant to make cold air, so the problem is inside the HVAC unit. Replace the motor that controls the blend air door (this is a difficult job and best left to a professional since it involves tearing apart the HVAC unit -- about an 8 to 10 hour job!). If the compressor does not engage when you turn on the A/C, see if it will run by jumping the compressor clutch wire directly to the battery (use a fused jumper wire). If the compressor works when you jump it, and the A/C blows cold air, the system contains refrigerant and the fault is likely a bad A/C compressor clutch relay or a bad clutch cycling switch or pressure switch. If the compressor does not engage when you jump it, the problem is a bad compressor clutch. If the clutch engages but the compressor does not turn (the belt will start to slip and squeal), the compressor is locked up and you need a new compressor. If the compressor clutch engages and turns the compressor, but the A/C still does not blow cold air, the system is probably low on refrigerant and needs to be recharged.

Put a mechanical gauge on the motor-- to confirmoil pressureThe electrical pressure sensor can fail & are not alwaysexact

On this truck it is electric so it will be hard to tell if it is going bad. The only thing you can do is change it.

The starting problem, Would have nothing to do with the cruise control or the seat heater, Have the charging system in it check out, It could be the battery, Alternator, Or evan the starter going on it,

If you are using a common code reader, most are not designed to read codes from body computers.If you are using a professional scanner, you may need to check the harness between the PCM and the body computer.

There are two possibilities:1.the scan is broken2.the scan can't work on your car.autocom cdp pro