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Prev Professional Automotive Repair Technical Discussions for March 25, 2013
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Open Help Requests for GM
Help Request Answers
1991 Buick Riviera Luxury 3.8L idle VIN: 1G4EZ13L3M
intermitten idle stall hook up modis go to read codes or data insterment cluster goes blank and says error swap out modis for an old brick same thing now with error message on dash can read codes and data but not sure I can trust it. About ready to throw a idl...
2005 Cadillac CTS 3.6L starter VIN: 1G6DP56745
vehicle came in with a supposed intermittant no start condition. during diagnosis, you can turn the key to the crank position and the starter will engage as normal. engine starts but the starter keeps running intermittantly. you can then turn the key off and t...
1995 Chevrolet K1500 5.7L Poor Idle Quality, Hesitation, Cuts out, Stall, MIL Lamp on, possible misfire VIN: 2GCEK19K2S
Sorry for the short data readings. I have a 1995 chevy 1500 in the shop 1995 has a stumble at idle and will stall out.This problem seems to happen when its cold or hot. Sometimes is worse when at normal operating temp and when starting first thing in the morni... Trouble codes: 33 (Map Sensor to High)
2002 Chevrolet Impala 3.4L power steering rack VIN: 2G1WF52E12
Vehicle first came in with the steering wheel hard to turn and the power steering pump making a lot of noise. Replaced the pump and it was better but the customer said the steering was getting hard again. We told him that we need to change the rack and pinion....
2005 Chevrolet Colorado Sport LS 3.5L No Start VIN: 1GCDS19695
Customer called with no start.It would crank and not start and if you remove the gas cap and wait a few minutes it starts.It seem to happen after getting gas.This is one of my best customers daughters truck.I havent seen the vehicle but they wondered if I coul...
2007 Chevrolet Aveo LS 1.6L Misfire VIN: KL1TD65657
So this Aveo is a used car on the lot. Didn't run good when we first got it but was low on fuel and then ran fine. So it sat on the lot for a while then sold it but noticed coolant leak before it got picked up. So we changed the timing belt and water pump. So ... Trouble codes: P0300 (Random cylinder misfire), P0301 (Cyl 1 misfire detected), P0304 (Cyl 4 misfire detected)
2005 GMC Envoy XL Denali 5.3L Oil pressure gauge VIN: 1GKES16M75
I have had this vehicle multiple times. Customer states that the oil gauge fluctuates at times and doesn't hear any engine noise. This has not happened to me as of yet and will be driving it for the week.I did a oil pressure test and all is in order. Any insig...
2008 GMC Yukon SLT 5.3L cam shaft &lifter VIN: 1GKFK13098
Vehicle came in with a rough idle and misfire, Code P0300, check over throttle body, Iac valve, and mas, map sensor, cleaned found reading with in parameters. Found a bad lobe & roller @ #3 cylinder. Installed new cam shaft,cam bolt,lifter,cam bearings, checke...
2003 Saturn Vue 3.0L antifreeze VIN: 5GZCZ63B83
on 1-16-2013 We changed the inter cooler and all seals and gaskets due to oil in the antifreeze, since then he has come back twice with 1-2 8th in. of oil on the top in his overflow bottle and milky foam at the oil fill neck. The oil is ok on the stick and in ...
2005 Saturn Vue 2.2L No Start, MIL Lamp on VIN: 5GZCZ43D55
Good afternoon. 2005 Saturn Vue 2.2 Ecotec Auto. Vehicle cranks with no start. Check engine and wrench light on. Multiple U2105 codes present and stored. Gas gauge reads empty and fuel light on. Added 5 gallons of fuel. Checked all grounding locations 1. At EC... Trouble codes: U2105
2007 Saturn Outlook XR 3.6L No Start, Poor Idle Quality, Stall VIN: 5GZER33707
I am at a loss... This vehicle came to me with a MIL light on and running very poor (misfire code and code for cylinder 2 fuel injector). But IT WAS running. Found a little rodent damage under the intake plenum and the wires to the connector for cylinder 2 fue...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Buick LeSabre Custom 3.8L Stall VIN: 1G4HP53L6P
Most everyone pointed to the key resistor or the VATS module even though the security light would not flash. Turns out it was the ECM, the customer replaced it with a used computer that was bad also. One big disadvantage of salvage yard parts. We wired in two ...
2007 Cadillac SRX 3.6L MIL Lamp on, Low power mode VIN: 1GYEE63757
We have NOT yet fixed this Vehicle, although all of the responses pertaining to wiring were followed up on. One thing we have narrowed it down to, is that using the throttle pedal, the problem happens often. Using the Cruise control, the problem never occures.... Trouble codes: 2138.
2001 Chevrolet Impala 3.4L Starting VIN: 2G1WF52E01
Sorry for late closing.We ended up replacing the bcm again its fine now.It was an ac delco new part.I guess there can be bad bcm from delco.I have always had good luck with delco.
2004 Chevrolet Suburban 1500 LS 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GNEC16ZX4
Thanks for all the replies and help. There was 2 main themes for the repair on this Suburban. First was the intake manifold leak. It was indicated that it would show up worse when the motor was cold and either go away or get better after warmed up. I could... Trouble codes: P0171 (Lean bank 1), P0300 (Miss).
2006 Chevrolet Cobalt LT 2.2L Engine Vibration VIN: 1G1AL15F16
thanks for all input. the final fix on this was we replaced both trany mounts and motor mount. the timing issue was rechecked by us because other shop had been in there. (why?) all was good in this area. in turn we regrouped and proceded, found mounts were the...
2012 Chevrolet Silverado 1500 LS 4.8L Pcm bcm VIN: 1GCRKREA7C
Talked to customer, he doesn't want any aftermarket stuff on there, so he is just going to live with it..
2007 GMC Sierra 1500 Classic SL 4.8L 1st Gear VIN: 3GTEK14V67
Thanks guy's problem was in the transmission, pulled it and tore it down, the pinion gears on the planetary set were all chipped and coming apart, nothing a Remanufactured trans won't cure.
2007 Saturn Vue 2.2L Cuts out, Stall VIN: 5GZCZ33D27
ok thank you guys for the help tim from wisconsin nailed it on the head we had a common ground for wiper relay/fuel pump relay/power window relay that is located under L/frt headlamp capsule that was causing our grief after cleaning even though it didnt look b... Trouble codes: B2470 (Comm code antennae missing), B2752 (Horn), B3718 (Wiper relay high), B3722 (Wiper low), B2600 (Drl relay), B3703 (Wiper washer).
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