Strange Issues. Please help a brotha out.

[SDWallhanger]

replace it and have a relearn done, you may have to have the relearn done as soon as it is changed if it won't start and make it to a shop
after that is done if your stabiltrac light is still on then you need a better scan as those codes can be bcm codes and require a scanner that can read them like a tech2 or snap-on, etc

Is it possible to do the relearn myself without a $500 code reader?

 

[Doubeleive]

Is it possible to do the relearn myself without a $500 code reader?

it's a special procedure, I don't know of any low end scanners that would do it but you could try looking around on google and see if there are any out there that can that are reasonably priced

 

[Doubeleive]

the kicker is it only takes a minute to do it with the scanner

 

[kbuskill]

We bought a 2007 GMC XL Denali this wknd with 163,000 on Odometer. When test driving it ran fine with no codes or messages other than low tire indicator. On way home from dealership we stopped at gas station to check air pressure. Upon stopping it started to idle roughly and then quit and then not restart until it cooled down. Also we noticed the cruise control did not work. The button light came on but no engagement light on cluster. After getting it started again it ran fine and we drove on, along the way random messages appeared such as stabiilitrak not engaged, service traction control and hood open.

Yesterday I replaced the brake light switch and that fixed the cruise control and message went away. Drove it today at lunch and it idled for awhile and then messages appeared again and now cruise doesn't work again. Can somet help me out. Does this sound like a bad ground somewhere or ??? Thanks all. I appreciate ya.
Russell

Just FYI, even a misfire will cause the Stabilitrac and Traction control lights to turn on.

The ECM is programmed to automatically disable the ST and TC when it senses any issues with the ignition or timing to take those systems out of the equation as possible culprits for the misfire or timing being retarded since those systems have the ability to reduce the engine's power output when they detect a wheel spinning or slipping.

Fix the engine issue and the ST and TC lights will resolve themselves.

If it were an actual issue with a wheel hub/speed sensor you would have an ABS light on as well, more than likely.

I would definitely change the crank sensor as a starting point before plugs and wires.

Where are you located? Maybe you are near a forum member that has a Tech 2 that would meet up with you and perform the relearn procedure for you. There are several of us that own Tech 2s.

 

[Jason in DLH]

If it were an actual issue with a wheel hub/speed sensor you would have an ABS light on as well, more than likely.

Yup...I can verify that the ABS light will be on with faulty wheel speed sensor.

 

[SDWallhanger]

Yup...I can verify that the ABS light will be on with faulty wheel speed sensor.

Thank you all for your help and expertise. I live in Northeast South Dakota. I will check with Auto zone today to see if they have a code readers that can do the relearn process that I can borrow.

 

[George B]

I would just order a tech2 and do it yourself. You will use that tool again and be glad you have it.

 

[SDWallhanger]

Truck is currently at repair shop getting Crankshaft positioning sensor replaced and relearned.

 

[OR VietVet]

Truck is currently at repair shop getting Crankshaft positioning sensor replaced and relearned.

Since is at the shop, have them pull a spark plug or two and send you pics of them and post here for review.

 

[SDWallhanger]

Gonna replace all plugs and wires myself this wknd. Then I know what I got. Gap at .40 correct?