Forum: Diagnostics & Troubleshooting

I just got a 03 Silverado with the 4.8 in it a and it is just going to be my daily driver for now but the mpg is horrible only 13 in the city and 15...

Finished my 5.3 swap and finally got onthe road. Started the engine many times,always ran smooth with my nelson harness and performance tune.Seemed...

I am having trouble getting my truck to start recently. After replacing my steering wheel control harness I seem to have a bad connection with the...

Hello everyone. I have a 2005 chev crew cab, 4x4. 5.3L. It has roughly 190kms on it. My truck has not run in 2 months. No one can figure out what is...

Both my knock sensors are throwing "low input voltage" cel codes. Time to replace? Or shud i be checking the wiring for a problem? This is a new...

I just finished a 5.3 - 4L60E conversion into a 1996 Sierra. I need a little info on a couple of things. These are mostly "is this normal"...

Wanted to run this by you guys and get some ideas. This is a 2004 ext cab with 6.0, cam, headers, and so on. Was runing a bone stock fuel system...

Well, once again I got the same problem as before.. truck runs real rich and starts kind of loping at idle with the rpms raising and dropping, but...

Well i got in my truck to run to the grocery store and a message come up and said reduced engine power. What does this mean? Also i am having to try...

i am having a problem. I cant get my truck to start after swapping an L33 into a 96 Sierra. I am wondering if not having my O2 sensors installed...

My Battery died this morning charged it and turned it on, the idle sounded weird. And the rpms were very very low.. The were moving around, between...

first off, i just would like to say, i so wish i would of seen this site a few moths ago, its an amazing place to me as i a am a gm lover, always...

Okay, little back ground. Christmas day, drove the truck fine, shifted great no signs of slippage., Went to go back in a parking spot no reverse,...

Ok so my 5.3 swap into my 94 silvy is great except for this... i took it for a decent drive in the mountains today and it seems like it is running...

Ok, swapped in the 80 and with it still on jack stands I tried to start it with no avail. It will not crank at all and yes, I checked all fuses,...

Was driving, looked down and saw the oil pressure was reading almost 80psi, while normally hot shows right around 40psi. First thing I thought of,...

Building an '06 sierra 2500, its a junkyard refugee(I work at a salvage yard).The body, ecm, bcm, speedo, column, and dash harness are off the '06...

Truck still shows right and left banks are lean. Truck will sometimes (normally cold) idle between 1000-1400. Other times (normally warm) it will...

hey guys i need some help im going crazy chasing this problem in my truck.its a 01 suburban 1500 has the 5.3 4x4 lt model.ive been getting this check...

Well not sure how to explain under hard acceleration truck losses all power let off gas pedal comes right back sorry guy not sure how to say it it's...