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Prev Professional Automotive Repair Technical Discussions for November 15, 2004
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Open Help Requests for GM
Help Request Answers
1981 Chevrolet Monte Carlo 4.4L wipers VIN: 1GAZ37J6BZ
Hi Group I have this monte that after a cold damp morning will not shut off its wipers until the engine is ran for 30 minutes. They are turned on to wipe the window and then just continues to run despite the switch being turned off. As with any intermittent ...
1989 Chevrolet V1500 Suburban Silverado 5.7L Slave cylinder VIN: 1GNEV16K3K
This vehicle came to us having a new clutch kit recently installed. Pedal felt fine but clutch slave cylinder was leaking Replaced clutch master and slave cylinder with OEM parts and system operated fine. Four months later vehicle returned with leaking slave c...
1991 Chevrolet Beretta 2.2L Rear brakes only VIN: 1G1LV13G8M
Customer blew out a rear brake hose and he replaced the hose, brake line and left wheel cylinder. When he brought it in to us there was very little rear brake. Don't like throwing parts at a vehicle to "see if it will work" but have had NO luck at all. Changed...
1994 Chevrolet Camaro 3.4L No Start VIN: 2G1FP22SXR
two weeks ago we installed a new fuel pump and fuel sending unit. the vehicle stalled while driving. we tested the fuel pump has no power. the relay has power and is switching. is there an alternative power source that cuts power to the fuel pump?
1995 Chevrolet S10 LS 4.3L Pedal To Floor VIN: 1GCCS19Z3S
Hello everyone and thanks for the help with this one. We have this S10 in that came in like 8 mos ago for the pedal goin to the floor. We installed a new master cylinder and bled..no help. We had advised the customer that the front brakes were shot too and he...
2000 Chevrolet Prizm 1.8L Timing chain VIN: 1Y1SK5288Y
Hello all, we have this Chevy Prizm (toyota) 1.8 engine here with a noisy timing chain/tensioner. With the valve cover removed, there doesn't seem to be any thing too terribly wrong. The noise is bad before the engine develops oil pressure and then quiets down...
2001 Chevrolet Tracker LT 2.5L alternator VIN: 2CNBJ63481
I have had this car for a week. It originaly came in with a bad battery that was replaced only weeks before by customer. The battery was cooked . We found that the alternator was putting out 18 volts. We ordered an alternator. The new one didn't charge at all....
1995 Geo Prizm LSi 1.8L No Start, Stall, Misfire VIN: 1Y1SK5287S
Hello techs! I am really having trouble with this car. Original complain: Stalling at stop signals and sometimes crank and no start. I noticed that the engine would miss for two or three seconds and then stall, but it would start right away. Back on the shop I... Trouble codes: 31 (VAF/MAF meter sensor signal.)
1999 GMC Sierra 1500 SL 5.3L fuel gauge washer light 4wd light VIN: 2GTEK19T1X
Owner brought truck in and the windshield washer light was on and 4wd light was on along with the fuel gauge going up and down. Test all grounds and could not find a bad ground.The owner says this will happen then it will go back to normal for alittle bit then...
2001 GMC Yukon XL 1500 SLT 5.3L sensor VIN: 3GKFK16TX1
heloo, abs activate before stop on dry road. I suspect lf sensor because it does not show speed til rf and rear show 10kph. other thing I notice speed show 5kph even it is not moving. thank Rick
1995 Oldsmobile 88 Royale 3.8L Hesitation, NO POWER VIN: 1G3HN52K2S
this car has a cold start problem, hesitation and stalling first minute after cold start, problem goes away and does not return till next cold start- temperature when car has problem is around 40 or below - this car has no codes and alldata pids look in spec o...
2003 Saturn Ion-2 2.2L data link VIN: 1G8AZ52FX3
No power to Data link connector .

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick Century Custom 3.1L Suspension VIN: 1235456612
Thank you to all 15 respondents, lots of great suggestions, helped out a lot, as always the fix was simple. re-checked suspension, tie-rods,ball joints,lower control arm bushings all tight. Then raised the front of vehicle and put in drive, found rh front hub ...
1997 Buick LeSabre Limited 3.8L ABS Module VIN: 1G4HR52K2V
Thank you to all who replied to my request.. Most that replied mentioned corosion on the connector..Therefore i took the connector apart and cleaned all the terminals. I found small amounts of corosion on several of the terminals. Thanks again for the much nee...
1985 Cadillac Eldorado 4.1L Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1G6EL5789F
I'd like to thank all that replied.. I retightened one of the ground traced wires and fixed a vac hose to the map sensor.. Tried another computer and still had the same problem. Well that problem happened to be my scanner. I decided to see what cadillac's onbo... Trouble codes: 18, 19 (crank signal open / fuel pump circuit), 22, 23 (open tps and est bypass), 25, 30 (modulated displacement and isc motor failure), 34, 35 (map sensor and baro shorted), 44, 45 (o2 sensor lean and rich), 51 (prom error).
1989 Chevrolet C1500 Cheyenne 5.0L Cuts out, Stall, Misfire VIN: 2GCDC14H4K
Thanks to all who responded to this help request. As it turns out the EGR was the problem. The sensing portion of the valve is what failed. I did try another egr before I posted the request(I forgot to mention that..my apology). Obviously the one I tried was n...
1990 Chevrolet G30 Chevy Van 5.7L No Start, Stall VIN: 2GAGG39KL4
the final solution to the problem was shorted wires behind battery going through fire wall. seems the customer washed the van prior to bring it in for service, nice guy? noticed power was low at ecm for fuel pump output was only 11.61 volts when van was runnin... Trouble codes: 44 (o2 sensor), 42 (est).
1996 Chevrolet C2500 Suburban 6.5L ABS/hydraulic system VIN: 1GNGK26FXT
Thaks to all that made an effort to try & help & sorry for the delay in posting this fix. Had several good suggestions including bad front brake hoses, bad ABS hydraulic unit or air in the unit or a possable bad new master cylinder among others. Here is wh...
1996 Chevrolet Cavalier LS 2.4L TCC release switch VIN: 1G1JF52T2T
Hello everyone and thanks. A manifold switch assembly fixed this one. The assembly is on the valve body. There is a TSB also for a damaged pump seal that will cause release pressure to leak out. This switch basically tells the PCM that the TCC has disengaged. ...
1998 Chevrolet K2500 Cheyenne 7.4L fuel gauge VIN: 1GCGK24J7W
I recieved 3 replys, both Jim and Troy said the fuel gauge problen was in the instrument panel.Troy said he had seen these vehicles run a long time with the fuel gauge needle quivering and no other problems developed. I relayed this to my customer and he decid...
1999 Chevrolet Silverado 1500 5.3L Communication VIN: 1GCEK14T7X
The Silverado isn't fixed as of yet. The fuel gauge fault and low fuel lamp is undoubtedly caused by weak 'brush' contacts on the sender and we plan to address that (thanks to Matt [...], a GM T...
2002 Chevrolet Astro LS 4.3L MIL Lamp on VIN: 1GNDM19XX2
After speaking with most of the drivers, they have indicated that they usually refuel with the engines running and the a/c on as they often have passengers in the vans. We have instructed them on the proper refueling procedures and reinforced the importance of... Trouble codes: P0442.
2003 Chevrolet Silverado 3500 6.6L Poor Fuel Economy, fuel in crankcase VIN: 1GCJK33103
well as everyone who replied said gm is having a problem with the duramax injectors 8 new injectors and power is back as is fuel economy interestingly the engine is very quiet now as well. dealer took less than 4 weeks to get the injectors supposedly the are r...
1996 Oldsmobile Aurora 4.0L headlights VIN: 1G3GR6ZC2T
It was almost unamimous to replace the headlight switch, and that was the problem. The customer choked on the price, so I cleaned it with electronic cleaner and a good blast of compressed air. Some of the responses advised against this, from personal experienc...
1998 Oldsmobile Bravada 4.3L service AWD light one encoder motor VIN: 1GHDT13W27
This one is fixed. I had several resonses for replaceing the encoder motor,faulty grounds and bad modules. I did not like the ground the module had so I did install another ground going to the module. I did check the encoder motor again and sure enough it had ...
1995 Pontiac Firebird 3.8L security VIN: 2S25222138
thanks for the help found wires broken to ignition switch. replaced ignition switch vehicle started and ran great after repair all the information was highly informative THANKS
2000 Saturn SL1 1.9L Excessive Emissions, Poor Idle Quality, MIL Lamp on VIN: 1G8ZH5281Y
Sorry so late on this post - Had to send this one to Saturn dealer to have both the ecm and bcm reflashed [130 miles and $200.00 later] They had said that somehow they both were not communicating with each other. As for the high idle at start up that has since...
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