Forum: Diagnostics & Troubleshooting

96 chevy SBSC with L31R I have performed the repin for the 0411 per the spreadsheet from Lextech. I just got my flash/tune from Blackbear, and am...

Ok guys, I have an 05 Tahoe that has about 6k on it since rebuild. About two weeks ago I got a stumble while driving in town and the dreaded...

My truck can’t go any faster than 35 m/h it switches first and second gear but doesn’t switch to third gear the speedometer works good the reverse...

Helpppp.! I have a 1994 c1500/k1500 EFI converted to carburetor 305 short box stepside Frankenstein.. i recently noticed a shit ton of white smoke...

I just bought a nice 01` shortbed with 200k seems to run ok but has a shake in engine po300 code and po308 put new plugs and wires ,switched coil...

I have a 99 4,8 silverado that has a check engine light that I think was thrown when I installed long tube headers on the truck , I have no cats and...

127xxx, runs great. Just got it 3 weeks ago. Took it straight to oriellys and ran codes, co265,po171 po300, po420,po442,po446,po174. I replaced power...

Hi every one I am having trouble figuring this one out. The problem I am having is weird. The truck runs fine at start up. Then after I drive for a...

so I posted a thread a while back about having some overheating issues when towing my new to me boat and still have not resolved the issue. I still...

127xxx, runs great. Just got it 3 weeks ago. Took it straight to oriellys and ran codes, co265,po171 po300, po420,po442,po446,po174. I replaced power...

fresh install crate LSA in a 94 chevy 1/2ton....the throttle quit working (drive by wire), wiring is good, any idea on how to decide whether it's ...

I have a 95 c1500 with an 01 4.8 and 4l60e (both from same donor vehicle, trans is new but spec'd for donor truck. My first issue is coolant temp...

I've had my truck swapped with a h/c/i 5.3 for a while now and have driven it everywhere with no real issues....aside from these 2 and I've had...

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...