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Prev Professional Automotive Repair Technical Discussions for September 6, 2011
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Open Help Requests for GM
Help Request Answers
1997 Cadillac DeVille 4.6L Alternator VIN: 1G6KD52Y9V
Hi, every one i know the pcm control voltage , while we driving voltage keep fluctuating between 8~13.5 volts, and when the voltage droping below 9 volts dash lights are comming on and engine cut off. I need to know the best way to find out where the problem ...
2005 Cadillac DeVille 4.6L starting VIN: 1G6KD54Y7U
Car came to us with an occasional no start , car will crank but no start , I can disconnect battery and car will run for about 1 minute and dies again no start,No engine light on but codes in history. Codes are po150 [...] fault b2s1, po154 [...] low act...
2002 Chevrolet Impala 3.8L Hesitation, Cuts out, Misfire VIN: 2G1WH55K21
Thanks in advance. I'm not realy up on GM'S this car is from another shop, This Impala falls on its face 3/4 too wot while popping in manifold and fuel knock . Cat tested good with pressure gauge, injectors are adding fuel, maf looks ok and has been changed, 1...
2006 Chevrolet Colorado LT 2.8L Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1GCCS19876
Thanks in advance to all that respond.This truck would barely stay running,after reading many posts on IATN,removed cam timing solinoid too find a missing screen,replaced solinoid with aftermarket solinoid started right up stumbled alittle cleared up and run g... Trouble codes: P0017
2005 GMC Yukon SLT 5.3L Oil pressure VIN: 3GKFK16Z65
Customer states that there is momentary engine noise on cold start. As vehicle is driven at a stop light check gauges light comes on, oil pressure reads less than 10psi. Any thoughts??? Are we dealing with a worn crankshaft and or crankshaft bearings?? Lifter...
1991 Oldsmobile Cutlass Ciera 3.3L No Start VIN: 2G3AL54N4M
Got a good one here. Towed in for no start but of cause it started. Let the car run and it died. I have spark and fuel pressure but no injector pulse. Performed scratch test at module and no pulse. Scoped out 3x signal going into computer and thats good. Scope...
2001 Pontiac Grand Am SE1 3.4L No Start VIN: 1G2NF52E81
This vehicle cranks will not start. Has no trouble codes , Has good fuel pressure, and spark. Monitor Crank sensors and camshaft sensor pids.Crank pids ok. Have no cam sensor signal. Replace cam sensor, still no signal. Also no injector pulse.Check wire from c...
2002 Pontiac Grand Prix GT 3.8L atf leak, lh side VIN: 1G2WP52K62
I'm not a transmission tech & I aint familiar with this, Alldata is not clear & we are not a gm dealership. My problem is that there is a atf leak @ the lh axleshaft seal. Upon removal of the seal I realized that the area that holds the roller brg in is cracke...
2003 Pontiac Montana 3.4L Excessive Emissions, Stall VIN: 1GMDU23E63
Hello and thanks for taking a look at this one, we have this montana van that came in for poor running, she said it stalls alot. at first it drove great but quicklly developed the stalling issue. after pulling the codes p0101 only, i inspected the maf and foru... Trouble codes: P0101
2006 Pontiac G6 GT 3.5L Battery draw VIN: 1G2ZH15886
Has 1.3 amp draw for about 30 seconds then drops to 135 ma. Pulling fuse 20 for the ICBM in the underhood fuse box drops it to almost nothing. I've waited 15 minutes for the draw to drop and it doesn't. If I unplug the connectors at the BCM, the draw goes away...

Fixes & Summaries for GM
Fix/Summary Answers
1973 Chevrolet Corvette 5.7L Noise in the rear end area VIN: 1Z37J3S405
We did find a chipped tooth on the ring gear and were very hopeful that was the problem. It was not and we did look at all the items that were mentioned. Guys, I am sorry about the delay in answering this but just when the repair began to surface, I left for ...
1993 Chevrolet Astro 4.3L No Start, Stall VIN: 1GNEL19W3P
I Want to thank every one who responded to my post and I appologize for closing this so late. The vehicle was put on the back of the line up so I worked on it in my spare time. Since many of your responses indicated a lack of fuel pressure I blocked the return...
2002 Chevrolet Silverado 2500 HD LT 6.6L No Start VIN: 1GCHK29102
Thanks so much to those who replied you guys were a big help. Well anyway as you could tell this was a nightmare. After my last update with the tests I had run decides to warranty the injection pump. That did correct the bleed down on the supply side, but d...
2005 Chevrolet Colorado Sport 3.5L MIL Lamp on VIN: 1GCDT19695
I believe this is fixed. For the heck of it, I disconnected the REAR Oxygen sensor and road tested while monitoring the front Oxygen Sensor switching and the switching rate was great. Installed a new REAR Oxygen Sensor and road tested again and switching was g... Trouble codes: P1133 (HO2S Insufficient Switching Bank 1 Sensor 1).
2005 Chevrolet Colorado Sport 3.5L 4wheel drive VIN: 1GCDT14625
Well guys I finally got my hands on a tecch 2. But cannot get truck back to continue on with diag, so i will put this one in the limbo category for now. if i get it back i will update. Thanks again to all that helped... We will not let these mechanized beasts ...
2008 Chevrolet Uplander LT 3.9L Door VIN: 1GNDV33198
Thanx to all that replied When we first got this unit in we had replaced touch pad and pins in sliding door - Inspected per TSB's on adjustments - unit functioned until they got home and he found door open next time he went out Reflashed unit for update on b...
2011 Chevrolet malibu 2.4L Airbag VIN: 1G1ZC5E17B
ok the female buckle has only a switch to tell the sdm your buckled in. there is a second pretensioner on the belt side covered by the bottom of the seat. I guess this is considered the rear tensioner, I was hung up in thinking rear was referring to rear seat...
2004 Oldsmobile Alero GL 2.2L No Start VIN: 1G3NL52FX4
well i could not find a real fix for this car. i ran a new wire from the gray wire off the fuse panel to the fuel pump and it worked. i am thinking it had a broken wire some where in the wire harness.
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