How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), GMC Mechanic
Category: GM
Satisfied Customers: 29430
Experience:  GM Grand Master Technician 2007. 14 years experience.
10949255
Type Your GM Question Here...
GM Tech (Cam) is online now
A new question is answered every 9 seconds

2004 gmc duramax, towed daughter's new 5th wheel, left it

Customer Question

2004 gmc duramax, towed daughter's new 5th wheel, left it hooked up and it drained battery. charged batteries, added 5 gallons of fuel (we thought someone might have siphoned us...turn key and the fuel needle stayed on "E"), turn key...fires and quites. Fires and quites. Did the bleed valve/fuel pump thing, no change.
JA: Is the car in "Park" or "Neutral?" Do you know if your car has a "wheel lock" feature?
Customer: In Park. Bought used from a Lot, don't know about the wheel lock feature.
JA: What is the model of your '04 GMC?
Customer: Sierra SLT
JA: Are you fixing your Sierra yourself? What have you tried so far?
Customer: See above. Haven't done anything else to it other than standard maintenance. Take it to Jiffy Lube for oil changes...had the rig for about 5 months
JA: Anything else you want the mechanic to know before I connect you?
Customer: Nope...rig has worked great until now.
Submitted: 5 months ago.
Category: GM
Expert:  GM Tech (Cam) replied 5 months ago.

Hi there, I am Cam.
This sounds like a security issue. Lets try a theft relearn.

Turn the key on and attempt to start the car, It may crank, it may start and stall or it may do nothing at all, this is fine, still cycle the key to start then release the key back to run.
Wait 10 minutes with the key in run. The passlock light should be flashing and the DIC will say "Service Vehicle" or "Security" or have a picture of a car with a lock during that 10 minute span.
After 10 minutes has passed, turn off the car, count to 10, and try to start it again and release the key back to run.
Wait another 10 minutes.
After 10 minutes, turn car off 10 seconds and try to start again and release the key to run.
Wait another 10 minutes.
After 10 minutes, turn car off 10 seconds and try to start again.
It should start up this time. The passlock has been learned.

During this process, turn the fans off, radio off and cycle the headlights off so the battery will not go dead. If needed, use a battery charger.