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Prev Professional Automotive Repair Technical Discussions for May 27, 2008
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Open Help Requests for GM
Help Request Answers
1997 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP52KOV
This lovely car was towed to us for a no start problem. Check saw that fuel pressure was only 20lbs thought easy fix new pump away they go...but after new pump fuel pressure was back with inspecs.. I have good spark, injector pulse, fuel pressure and ...
2001 Cadillac DeVille DHS 4.6L Poor Idle Quality, Surge VIN: 1G6KE57Y41
car surges at idle up and down and sometimes surges hard enough to die out. seems to be worse after it warms up. smoke tested and found a leak at the boot that attaches the throttle body to the intake, went ahead and replaced the boot and intake gaskets. still...
1993 Chevrolet S10 Blazer 4.3L No Start VIN: 1GNDT143W3
Customer complaint- started, ran fine for 10-12 min., then ran rough or died. Checked and had intermittant injector pulse. Checked dist. and replaced shaft, pickup coil, and module. Same problem. Checked power and grnds. at computor. Replaced computor and PTOM...
2002 Chevrolet Silverado 1500 5.3L transfer case VIN: 1GCEK19T32
Hello fellow techs,I have a good one. When transfer case is in 4x4 high or 4x4 low, it exhibits a whinning noise when slowing down and grows louder when turning. This occurs below 10 mph on dry pavement. The noise is not there in 2 wheel high, or in auto 4x4. ...
1996 GMC C3500 HD 6.5L Excessive Emissions, Poor Fuel Economy, MIL Lamp on, no power,black smoke VIN: 1GDKC43E8T
engine has no power on any kind of accell & blows so much black smoke, you can't see behind the truck. have received 1 warning so far. truck was purchased on ebay(I'll never do that again) & driven 1600 miles home, used 4 qts of oil & had to stop for repairs t... Trouble codes: P0236
2003 GMC Sierra 2500 HD 6.6L lights VIN: 1GCHK23183
The signal lights flash to fast on booth sides,the 4 way flasher work normally,all the bulbs are ok replaced anyway,replaces flasher,signal light switch,check all fuses,grounds,when you hook up another bulb for extra load it work normally,there seems not to ha...
1988 Oldsmobile Cutlass Ciera 2.8L over voltage code 51 VIN: 2G3AJ81W6J
This wagon was fine when customer shut it off. Upon restart SES light came on with code 51( high voltage). Computer sees 19Volts running, 16volts koeo. Battery is 14.5Volts running and 12.4 koeo. The kicker is there are no other codes but the engine races and ... Trouble codes: 51 (High Voltage 19v)
1999 Oldsmobile Alero GL 2.4L Water Outlet VIN: 1G3NL52T9X
The housing we are talking about is on the drivers side of the motor and there is no thermostat in it and the top radiator hose connects to it, and is only available in OEM plastic. We had the customer in and we checked the car out throughly and could not make...
2001 Oldsmobile Silhouette Premiere 3.4L Cuts out, Stall VIN: 1GHDX13E61
Vehicle stalls intermittantly, usually at idle, cold or hot. Also cuts out at idle or driving above 3100 rpm. Performed vacuum test while cutting out and found exhaust restricted at Cat. and rear O2 matching front signal. Replaced cat and rear O2. No change. C... Trouble codes: P1122, P1189, P1626
1987 Other GM Coupe 5.0L TCC solenoid VIN: 12AAV1230H
The Avanti factory purchased NEW '87 Monte Carlo SS, removed body and installed their body. PROBLEM: At 60 mph on interstate TCC solenoid will keep turning on and off. Do not notice any problems with TCC solenoid below 60mph. Scanner shows road speed constan...
1996 Pontiac Firebird Formula 5.7L 1-2 shift, Overdrive VIN: 2G2FV22P8T
We have a customer vehicle with a 4l60E Transmission. When you put the car in drive, you might as well be putting the car in neutral. According to the scan tool, the shift indicator is working correctly. There are no transmission related trouble codes, and the...
1997 Pontiac Grand Prix SE 3.8L No Start VIN: 1G2WJ52KOV
I replaced the IGNITION MODULE twice!!! Vehicle towed in crank no start no spark. Has fuel pressure and injector pulse. I have power, ground, 3x and 18x crank signals to the ICM. I also have cam signal going in and coming out of ICM. I do not have 3x signal co... Trouble codes: P0336
2006 Pontiac Grand Prix 3.8L Hesitation, Cuts out, Stall, MIL Lamp on, reduced power VIN: 2G2WP52261
The problem only occurs during heavy rain. Loses control over elec throttle. Cannot duplicate symptom in shop. Replaced APP sensor, found corrosion in C101 (frt of L strut tower) and repaired. No joy. Am aware of TSB for H2O intrusion at L kick panel area - no... Trouble codes: P1125 (APP sys fault), P2138 (APP sensor 1 - 2 correlation), U1000 (Comm error in EBTCM only)

Fixes & Summaries for GM
Fix/Summary Answers
2000 Cadillac Escalade 5.7L Door Seal VIN: 1GYEK63R5Y
Thanks to Dan [...]. Dan had a very good description of exactly how to adjust he door. We followed his instructions to the letter. We also found the upper weather-strip that is attached to the body above the main door weather-strip was not installed corr...
1993 Chevrolet Camaro 5.7L No Start VIN: 2G1FP6P6P2
Hello Gentlemen thanks to Osvaldo,Tony,David,Patrick,John,Terrance and Chris, you chaps were bang on with your diagnosis. I scoped the connector on the side of the intake manifold as you all suggested and got no trigger signal, also my scanner didnt display a...
1993 Chevrolet Pickup C2500 7.4L Mechanical
thanks for the replies. no mounts or loose bolts were found. the customer is not too concerned because the noise has been there a long time and he is used to long as the compressor lasts he is happy.i tried ordering the high enertia pully as was suggeste...
1996 Chevrolet Monte Carlo LS 3.1L No Start VIN: 2G1WW12M4T
THANK YOU one and all that suggested we check the fuel pump connector, we replaced and it started up!!! THANKS AGAIN!!!Elden
1998 Chevrolet S10 LS 2.2L MIL Lamp on VIN: 1GCCS1945W
have ordered a new intake tube as this one is crimped a little, both intake and exaust ports are open and clear, exaust is stock so I'm assuming this little 8 dollar tube is the cure. Thanks to all that replied but i'm still checking this one, will write when ... Trouble codes: P0401.
2005 Chevrolet Silverado 3500 6.6L charging system VIN: 1GCJK33215
Perform T.S.B. 02-06-03-008C Info. on voltmeter gauge fluctuation due to regulated control sys. and concerns about camper|trailer battery charging.
2007 Chevrolet Tahoe LTZ 5.3L pinging, spark knock VIN: 1GNFK13037
This vehicle will be returning to the dealer with a recommendation for the customer to contact the local Dealer Rep. to help with this repair. The E85 update has been done @ the dealer with the same results. I will update this Help Request when more info is av...
2001 GMC Sonoma SLS 4.3L MIL Lamp on VIN: 1GTDT13W41
Cleaning the filter inside the EVAP canister and vent tube seemed to take care of the problem due to I have not heard back from the customer. Thanks for all the help Matt. Trouble codes: P466.
2004 GMC Envoy SLE 4.2L Misfire, MIL Lamp on VIN: 1GKDT13S14
Thank you for all the assistance in this request for a repair. Once we found that on the intake side of the cylinder head that the rockers had 1 rocker off per cylinder and 2 off on cyl. number 2. We found no cam problems we R&R cylinder head and disassembled ... Trouble codes: P0302.
1983 Oldsmobile Cutlass Supreme Brougham 3.8L Stall VIN: 1G3AM47A9D
Thanks to Richard,Ken and Brad. Well after talking to the tech he stated while checking for a miss he pulled a plug wire off the cap and it arched to the four wire plug for the dist. Well we finally found a used ECM and installed it and all is well. Thanks aga...
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