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Prev Professional Automotive Repair Technical Discussions for September 19, 2013
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Open Help Requests for GM
Help Request Answers
2005 Buick LaCrosse CX 3.8L line pressure VIN: 2G4WC53285
this is for my trans rebuilder. this car came in originally for slipping/bad trans. Rebuilt trans sent on way all seemed good. customer took a long road trip came back harsh shift complaint. examination shows trans bad inside rebuilt again. now exstended and h...
2004 Chevrolet Avalanche 1500 Z66 5.3L Temp Control VIN: 3GNEK12T64
I have an 04 avalanche that blows hot on left and cold on right side. Automaticly replaced left actuator motor. Cleared all codes. Still blowing hot on left side. I can watch the actuator turning plastic gears while turning temp knob. Temp never gets colder. I...
2008 Chevrolet HHR LT Panel 2.2L no crank VIN: 3GCDA05D58
i have a 2008 chevy hhr 2.2 no crank i am getting the crank signal to the ecm. i can read the data on my scanner. but the ecm does not send the signal to the starter relay. also with the key on if i jump the starter relay out the car starts runs perfect. all...
2009 Chevrolet Traverse LS 3.6L MIL Lamp on VIN: 1GNER13D69
vehicle is for a used car lot. they replaced all o2 sensors. vehicle came in with p2097, p2099, p0420, p0430. I cleared codes and drove it for a day. only codes p0420 and p0430 reset. I seen a couple of service messages/tsbs for these vehicles saying check for... Trouble codes: P2097, P2099, P0420, P0430
2011 Chevrolet Silverado 2500 HD LT 6.0L MIL Lamp on VIN: 1GC1KXCG5B
So the story is the customer hit a deer and ever since then the engine light came on. Scan truck and found codes, thinking it was going to be cut and dry. I have tried a few things and would like some more ideas. Oh my fuel trims are crazy, short term was 12 o... Trouble codes: P0171, P0174
2003 GMC Sierra 2500 SLE 6.0L No Start VIN: 1GTHK24U83
I am replacing the pcm as per no crank pinpoint test. During programming of the PCM with the tech 2 and tis2000 I get the error message "SPS: No communication at step 14, check connections and retry." Does anyone know what this message means. I haven't found a...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Chevrolet Blazer 4.3L Misfire VIN: 1GNDT13W1T
Fixed! While several folks suggested replacing the dist cap & rotor, Dan [...] hit the nail on the head. Apparently the insulation of the cap was sensitive to moisture and was allowing the misfire to occur ONLY after sitting overnight due to the condensat...
2003 Chevrolet Tahoe LT 5.3L Starting VIN: 1GNEK13ZX3
sorry its taken so long for me to close this request but i just now got back to be able to work on this. after a few hours of working on this i decided to narrow it down to trying to figure out why it wouldnt crank and after checking power and grounds at the r...
1994 Oldsmobile 88 Royale 3.8L Misfire VIN: 1G3HN52L3R
2005 Saturn Ion-2 2.2L transmisiion VIN: EDF345EDC5
ok , as i thought - being i only lost communication with trans module at times and is the only one that did not have a communication trouble code, lead always to a module that cant see the communication issue. we replace the trans control module with new - (c...
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