My GMC Sierra just quit going down the road, anti theft came on and now it won't star

SOURCE: 2006 GMC Sierra electrical problem

If your Sierra has a Duramax, it may be the intake air heater or the fuel heater cycling on and off in the cold weather. But if its pulling the voltage down to 12V after warmup, I would suspect a poor battery. As suggested, get a load test at autozone or ??

SOURCE: car wont star anti-theft light keep commin on

2000 FORD TAURUS. JUST BOUGHT WAS RUNNING GREAT. IT HAS BEEN SITTING FOR ABOUT 4 YEARS STRAIGT. HOW DO I GET KEY RE-CODED? JUST REPLACED CATAY.CONV. NOW THIS PROBLEM

SOURCE: 1997 GMC 5.0 litre 1500 sierra fuel pump hums all

That's a posibility!

Test fuel pump pressure, if it is low or doesn't hold up, change it before quits.

Also, check the fuel pump relay, it could be stucked.

Good Luck

ZJ Limited

• 17989 Answers
• Posted on Mar 10, 2010

SOURCE: i need to be walked

Here have information about #791 bypass module: Bulldogsecurity Model791

IF YOUR REMOTE STARTER IS CLICKING AND/OR FLASHING THE PARKING LIGHTS AND IS NOT RESPONDING TO THE REMOTE, IT IS IN SAFE MODE AND NEEDS TO BE INITIALIZED BY DOING THE FOLLOWING:
If you have a 4 button remote, you must ground the black/blue hood pin wire (raise hood if hood switch is installed). Apply 12volts to blue/black brake wire (press and hold brake pedal if wire is installed). Press and hold any button on your remote until clicking and flashing stops. Unit will now respond to the remote. Remove ground from hood pin wire and voltage from brake wire. If you have a 2 button remote, hold brake and press any button on the remote until clicking and flashing stops.

ADDENDUM
If you have an RS1100 or RS1200 and your vehicle runs for several seconds, shuts off, restarts, runs, and shuts off again, perform the following step: Connect the Black/White tach wire (from the 16 pin plug) to the heavy gauge White Ignition 1 wire and program the unit for Tach Mode (bottom of page 19).

Witch model alarm have your vehicle?

Good luck.

Testimonial: "awesome info with lots of extras! went above and beyond the call of duty! "

SOURCE: LOW OIL PRESSURE ON 2007 GMC SIERRA 1500. CHANGED

have it tested using a manual gage if still low then main baring ore most likely bad that would mean a over hall if is really low and bearings bad should be making rattle noise when started up first few seconds

Testimonial: "thanks alot.truck is not making a rattling noise.we did check it with a manual gauge.it read about 10 at idol. press. gets better as you incr speed"