Forum: Diagnostics & Troubleshooting

I am in the process of removing the sludge from my 5.3 2004 Tahoe. My castech heads went bad around 130K. I pulled my oil pan and noticed there are...

I have a 02 Denali for donor awd 6.0 of course I want my 05 rcsb 4.3/5spd to be converted to awd 6.0 auto. Has anyone here done this. I...

He guys so I had a 2003 denali 6.0 lq4 complete remand done with a few modes. first valve job with zo6 beehive comp valve springs and push rods, gmpp...

I still have, for the most part, a stock 5.3 from a 2008 Tahoe in my 88 K5 Blazer, so we're talking 330 to 350hp at most. I do have some JBA headers...

Truck is a 99 "classic" body style 3500 with 5 speed manual.4x4. I need help getting the speedo, coolant temp, and oil pressure to work. Any help is...

I'll make this brief. Did LS 4.8 swap, engine, trans, harness and all as unit from donor vehicle Into my 91 Silverado. Replaced harness with a unit...

After 1200 miles on my lq9 swap my engine developed a metallic tick. The sound only becomes noticeable around 190-200 degrees. My thoughts were a bad...

So I have got my 4.8L Ls swap running in my 1996 C1500. I removed the old PCM for the 4.3v6. I am wondering if I am missing something to get my...

So been a while since i have posted, projects went away and life happened. Anyway, i'm experiencing problems with my 07 gmt900's transmission where...

Installed the transgo shift kit in my 4l80e and I'm not sure if its working right. I have done shift kits before and they would shift firm and hard....

I swapped an 02 4.8 and 4l60e trans into my 91. After pulling my hair out over other issues, the truck still runs rich and is a slug from a dead...

I have a 5.3 that I swapped into my obs I put an ls6 intake on the engine and swapped the cam. I did have the ecm tuned for the cam. (mail order) ...

I will try to be as brief as possible. 91 Silverado with 02 4.8 swap. After first several attempts to start, engine ran (each time I tried to crank...

Hey guys it's been awhile since I've posted anything. I recently picked up a 2001 1500HD with the 6.0. The motor was bad but guy had bought another...

I did a 6.0 swap engine runs fine no check engine light but when you hook the truck up it has a u0100 code stored could this be a tuning issue.

I had a 160 Stat that was getting stuck open so I put a stock one back in. Had it tuned for the 160. Will I need to get a retune for fan speed or...

OK, truck is a 96 S10 with a 408/T56 swap, using a custom harness made specific for the truck by Current Performance in FL. Tune and PCM are from...

I need help guys. I have 04 Silverado 5.3, bbk 80mm tb, underdrive pulleys, gm lsa cam 226/236 525/525 110lsa, 8.5 msd wires, tr6 plugs, 1 3/4 long...

So I'm trying to diagnose a problem with my truck and I'm running out of ideas... there may be a couple problems. I'm hoping you guys can help. I...