Strange Issues. Please help a brotha out.

[SDWallhanger]

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

 

[Bill 1960]

Stabilitrak and traction control both run off the wheel speed sensors, so that’s likely one problem sensor with two symptoms.

Hit up a parts store and have it scanned for active and stored codes. Post them up. Then you’ll have a lot more information.

 

[wjburken]

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

Welcome to the forum from Iowa.

Did you happen to see what the codes were that are behind the messages on your DIC?

Need to get to the basics. My suggestion would be to change your plugs and wires just to eliminate those issues. I would also get some MAF cleaner and see if cleaning your MAF sensor helps.

But need the codes to really guide the process.

 

[SDWallhanger]

I do have a code reader and will plug in and see if there are any codes. Thanks, Russell

 

[SDWallhanger]

 

[SDWallhanger]

Took pics of messages and code reader. No codes found.

 

[wjburken]

Took pics of messages and code reader. No codes found.

Does that scanner have the ability to read ABS codes? Not all scanners do.

 

[SDWallhanger]

Does that scanner have the ability to read ABS codes? Not all scanners do.

No, I don't think it does.

 

[SDWallhanger]

No, I don't think it does.

Should I take it to AutoZone and have them try their code reader? What are we looking for?

 

[wjburken]

Should I take it to AutoZone and have them try their code reader? What are we looking for?

Yes. You are looking for ABS/Speed Sensor related codes.

 

[SDWallhanger]

Yes. You are looking for ABS/Speed Sensor related codes.

Ok, will check it tomorrow and let you know.
Thanks for your help. Guess I will get new plugs and wires while I'm there.

 

[Doubeleive]

as long as that stabiltrac/traction light is on the cruise control wont work. It's a safety thing because it's getting erratic or bad data from somewhere so cruise is disabled.

 

[SDWallhanger]

Mmm, ok. Going to repla e plugs and wires and then will update.

 

[SDWallhanger]

ok, so yesterday check engine light came on as well with error code P0335 Camshaft Positioning Sensor.
Now what do you ll suggest. Camshaft Positioning Sensor or plugs and wires or both??

 

[Fless]

ok, so yesterday check engine light came on as well with error code P0335 Camshaft Positioning Sensor.
Now what do you ll suggest. Camshaft Positioning Sensor or plugs and wires or both??

You're in the 2021+ section. Take it in for warranty work.

 

[SDWallhanger]

sorry. not sure how I did that

 

[SDWallhanger]

Ok, will check it tomorrow and let you know.
Thanks for your help. Guess I will get new plugs and wires while I'm there.

No other codes, but yesterday check engine light came and a blew code P0335 Camshaft Positioning Sensor. So waht yall think now. Camshaft Positioning Sensor or Plugs and wires or both??

 

[SDWallhanger]

Mmm, ok. Going to repla e plugs and wires and then will update.

Ok so no and brake codes and check engine light no2 on. Blew code po335 Camshaft Positioning Sensor. So what y'all think now. Camshaft Positioning Sensor or plugs and wires or both??

 

[OR VietVet]

Welcome to the forum from Oregon

@Fless he said in first post was a 2007 GMC XL Denali but was in the wrong section. Like has been said by @wjburken and @Bill 1960 said, complete codes are needed.

Also been said, the front likely has a bad hub bearing or two and when replace, for the love of God, don't go cheap. get Timken or AC Delco. May also just have some wires/connectors causing the problems at those wheel speed connections. If you have no idea on the age of the plugs and wires you again can get some good quality AC Delco parts for that but the plugs may look great. Pull one or two on each side and post pics here for recommendations. You will get there eventually with the fix on these problems.


May end up with one of these too. https://www.rockauto.com/en/moreinfo.php?pk=993793&cc=1433459&jsn=2045

 

[SDWallhanger]

so dont replace Camshaft Positioning Sensor. Replace Front Hub Bearings instead?