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Prev Professional Automotive Repair Technical Discussions for November 9, 2012
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Open Help Requests for GM
Help Request Answers
1992 Buick Century Custom 3.3L Poor Idle Quality, Cuts out, Stall
customer went into store, came out and car wouldnt start. car eventually started but customer had it towed in to be safe. i go start car, misfire noticable at idle and while driving car into service bay. first thing i did was look at plugs and wires. 3 diff m...
1998 Chevrolet Venture 3.4L maf VIN: 1GNDX03E1W
replaced iac n maf w/autozone n same scenario.fires up n runs good,after a good soak engine idles down to point where it starts rockin n tryin to stall.turn ac on n idle comes up a small amount of black smoke at tailpipe indicates a little rich,no vac leaks.in...
1999 Chevrolet Astro 4.3L monitor status VIN: 1GCDM19W5X
thank you in advance for any help. customer brought in an astro van that has been rejected for the emissions test 3 times. no codes / no codes pending or in history . he had another shop put in a new cat. convrter. they did use a cheap aftermarket cat. I under...
1999 Chevrolet W3500 Tiltmaster W3S042 4.8L Oil blow by from breather tube VIN: J8BB4B158X
Blows oil through breather down tube inconsistantly. Only started after last oil change. No loss of power,no unusual noises from engine and drives fine. Sent oil sample to Titan Labs for analysis Report came back "Wear pattern does not indicate metals in oil" ...
2007 Chevrolet Silverado 1500 LT 4.8L Anti Lock activation at low speeds VIN: 1GCEK19C07
Once again I would like to thank all for your time and input. I will try to get all info in.. The veh came in with customer complaint of loss of speedometer and trans not going into overdrive, tech found code c0055 r wss circuit fault and also unwarranted abs ...
1990 Oldsmobile Cutlass Cruiser SL 3.3L Poor Idle Quality VIN: 2G3AM84NXL
Hi everyone i have this 90 ciera cruiser and stumbles on cold start only. Once it warms up car idles fine also idles fine in drive on cold start. checked compression and did balance test also fuel PSI ok. I know this gm engine had problems in the past with inj...
2000 Saturn SL2 1.9L Mechanical VIN: 1G8ZJ5277Y
Hello, I need some input, we rebuilt the engine in this Saturn and seem to be having starting issues. It cranks fine as soon as you try to start the engine it backfires out the intake with fuel included? I am out of ideas. I ran a leak down and have checked th...
2007 Saturn Vue 3.5L air bag system VIN: 5GZCZ63427
Hi guys, Have found a code B0092 in the Air Bag module passenger presence system1 circuit fault. not entirely sure where to go for this code. I'm told there may be a connector with a problem however I do not have access to the necessary information that I need...
2007 Saturn Outlook XR 3.6L Headlamps VIN: 5GZEV33757
Hi all- this outlook has a problem with the headlamps. They will flicker a time or two and then go out. Occasionally, turning the auto/manual dial will get them to come back on. Checked fuses/relays, etc... Found pin 87a on hid/lo beam relay has been hot enoug...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Cadillac DeVille 4.6L Poor Idle Quality
replaced idle air control motor and throttle position sensor, car still has intermittent 2500 rpm idle, I dont usually give up on repairs but this one I sent to cadillac dealer, they replaced the cars computer and reprogrammed, car is now back to normal idle.
1994 Chevrolet K3500 Cheyenne 6.5L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1GCHK34F6R
It was a bad pump as suspected. Too bad it took R&Ring the pump 4 times to finally convince the pump shop of that... Thanks to all who replied, really appreciate the input! Trouble codes: 17 (High resolution circuit fault), 18 (Pump cam reference pulse error), 35 (Injection pulse width error/response time short), 36 (Injection pulse width error/response time long), 54 (Pcm fuel circuit error), 88 (Tdc offset error).
2004 Chevrolet Suburban 1500 LS 5.3L tire light VIN: 3GNFK16Z94
I hate typing this almost as much as I hate reading it in the fixes and summaries. The customer declined to go further. I did not get a chance to check for and old sensor lodged in the wheel well from a previous blowout which was an excellent suggestion. I wou...
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