Hi, folks.
05 H2 (205,000 miles)6.0L

It's been a couple days that the brake, ABS and TC lights come on at start up. It also dings about 10 or more times, but doesn't act up all the time. Sometimes the warning lights even go out. I haven't notice any different in running, although some symptoms may be growing. I've had the windows not roll down, radio cut off once and doors not lock.

The code: P0332
Knock sensor 2/ Circuit low input(bank 2)

I have googled the repair on youtube, found it was more than I imagined, but one mechanic said it was not a major job that needed immediate fixing. Matter of fact, he said it could go for awhile if the sensors were the only thing wrong. Now, I'm not believing it should be just ignored, but how serious would you folks think this can prolong? I was hoping not to have to drop around $500 in an instant if I didn't need to.

 

I'm not convinced that the knock sensor code is causing all the problems. I just seen on here about some wires right under the dash that someone found fixing and a possible ground or other connection being loose, but I just wanted to bring the only code up that was rumored to may cause these issues. Thanks

 

I still haven't been able to get this truck into a dealer or other mechanic due to needing for work, but I'm recently getting another symptom to add. A few times after the truck has been sitting(usually overnight), some of the warning lights come on, but all the gauges, radio, door looks and windows don't come on until I hit the brake. Then, all comes on and the brake light does its 30 dings. I don't think it would come on if I didn't hit it.

I really need some guidance to try on my own, because it's difficult for me to not have for the day. However, I assume that's going to be the best idea no matter what.

Thanks for any input.

 

My guess is some ground somewhere is corroded and now has a poor connection.

 

OK thanks... I cleaned up the one under the driver side headlight area and the one under the drivers side door on frame.
I didn't do the one by the mid firewall area. Are there many more all over?

 

Yeah. Several are behind plastic panels on the inside and one looks to be under the passenger seat.
Forward one drivers side on the frame for forward lighting.
There are like 3 or 4 different ones that attached to and around the engine.
One behind the driver kick panel.
One behind the driver kick panel.
Frame under drivers door.
Under passenger seat on the floor.
About a foot up on the inside of the driver side B pillar.
About a foot up on the inside of the passenger side B pillar.
On both the driver and passenger side body mounts brackets that are welded to the frame (all four of them have grounds bolted to them).
Back wall on passenger side about midway up.

 

Very helpful. I appreciate it much.
I'll go to work.

 

But, in many cases the wheel sensor or speed sensor gets a short. It's an easy fix Sometimes all it needs is to be zip tied

 

were you able to solve the problem

 

Hello, I am new to the thread. I have wanted a hummer for years and finally found one. But, it has the abs, brake, and tc light on. The owner says I just need to have the codes cleared at the dealer. In you experience, should I be looking at something more serious? Is it worth paying $6k for the vehicle with this problem?