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Prev Professional Automotive Repair Technical Discussions for May 14, 2004
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Open Help Requests for GM
Help Request Answers
1995 Buick Park Avenue 3.8L Stall VIN: 1G4CW52KXS
the car came in.lightning hit 8 inches from car.had spark and no fuel psi.replaced pcm and it starts and stall.i can not get cominication with the computer. help if you can.thanks
1990 Cadillac DeVille 4.5L No Power VIN: 1G6CD5334L
When you accel the car falls on it's face, no power. If you keep your foot in it, it will eventually pick up speed and keep on going. Looking at the scanner i noticed the timing drop from 29 degrees to 8 degrees then increase back up to 40. I also noticed map ... Trouble codes: 41 (Camshaft sensor signal not present at ECU)
1994 Cadillac Seville STS 4.6L steering gear VIN: 1G6KY5296R
vehicle has thumping/lumber noise in steering over small/large bumps at any speed, when steering is turned one way or the other noise decreases/goes away, and will make noise stopped & moving steering wheel slightly back & forth while engine is running, koeo n...
1995 Cadillac DeVille 4.9L sluggish no pep VIN: 1G6KD52B1S
Need help on this Cadillac Deville with hard to solve problem; Grounds seem to be a pattern failure on this cars, and no fix results from the - symptom - fix - according to its problem-fix relationship Vehicle's motor symptoms same as a plugged up catalytic ... Trouble codes: N/A (No Trouble Codes)
1988 Chevrolet V30 Silverado 6.2L Excessive Emissions, No Start, Cuts out VIN: 1GCHV33JXJ
This truck has a cold start problem that once its started go's away. on initial start-up it will start and imidiatly stall and than has to be cranked several seconds before it restarts and is good the rest of the day. we have replaced injector pump,all the rub...
1988 Chevrolet S10 Blazer Sport 4.3L Poor Fuel Economy, MIL Lamp on VIN: 1GNCT18Z6J
Customer complaint is black smoke out of tailpipe and cel on. The vehicle is running rich but sets a code 44. Intergrator is around 126 and block learn are around 106. Tried lowering fuel pressure with no luck.Done pin checks at pcm also. Kinda don't know whic... Trouble codes: 44 (lean exhaust)
1989 Chevrolet R2500 Suburban Scottsdale 5.7L Poor Idle Quality VIN: 1GNGR26N0K
Start up idle normal. IAC about 15, place into gear, IAC climbs to 110, RPMs go to 750. When placed back into park, RPMs goto 1500, IAC stays at 110. Shut off engine, let set for a few minutes, refire engine, and idle returns to normal, until placed back into ...
1991 Chevrolet Lumina 3.1L Poor Idle Quality VIN: 2G1WL54TOM
we had the car in a couple weeks ago for idle prob. and keeping its speed when driving when you are off the gas, then the idle will suddenlt drop when you come to a complete stop.. we replaced the iac valve and map sensor. came back the other day same problem ...
1997 Chevrolet C1500 5.7L No Start, Cuts out, Stall VIN: GTEC19RXV1
customer will be driving truck down the highway and it will just cut out. Loses all power: no radio, instrument panel lights. Just like someone disconnected the battery. When truck cuts out, no power to dash instrument panel or radio,the engine will still turn...
1997 Chevrolet S10 LS 4.3L Air Bag VIN: 1GCCS19X6V
Air bag light stays on. Code B1042 stored. Diagnostic System Check performed(ok).when performing flow chart have 1v. on driver 36 vlr. disconnect 2-way yellow connecter& arming sensor,volt stay about the same 2v. voltage on ign.stay at 10.8v. next step was to ...
1998 Chevrolet K2500 Cheyenne 6.5L lifters VIN: 1GCGK29F8W
Truck originally came to shop with a missfire complaint,diagnosed and removed valve covers to inspect valve train. Cylinder 5 exhaust rocker arm had aprox. 1/4" of slack and could see that lifter had come apart and the push rod was bottomed out into the lifter...
2001 GMC Yukon SLE 5.3L ac tensioner/compressor VIN: 1GKEC13T61
Hello everyone, this vehicle came in for evacuate and recharge ac not working my tech noticed there was no belt on the Ac compressor the bearing on the tensioner had side to side play, so I got an original tensioner and 2 serpentine belts one for the alternato...
2000 Pontiac Montana 3.4L tcc system stuck on VIN: 1GMDU03E0Y
hello gm tech i would like to thannk you in advance . a customer came in this morring and said his engine light came on . i checked for codes found { po742 tcc stuck on} checked harness and connections every thing passed i stuck and need some help . thanks aga...
2001 Saturn SC1 1.9L Poor Idle Quality, MIL Lamp on VIN: 1G8ZN128X1
We tested the secondary ignition and find cylinder 1 misfire. we can swap 1 and 4 and misfire will follow. all ways from the same coil tower. we scoped the crank and cam sensors and the pattern is good. we swapped injectors with no change, when wires are swapp... Trouble codes: P0300 (mis-fire can monitor with tech 2)

Fixes & Summaries for GM
Fix/Summary Answers
1995 Buick LeSabre Custom 3.8L no pcm data VIN: 1G4HP52L7S
replace faulty pcm. now has good cummunication. thank you
2001 Buick Century Custom 3.1L Starting VIN: 2G4WS52J41
2001 Buick-no start-problem with security system-I put in anew BCM had it program & relearn key password. Start it up & is running great. Thank you
1996 Cadillac Eldorado 4.6L Climate control Display/Driver information center VIN: 1G6ET1291V
The power to illuminate the electric climate control head and the information part of the instument cluster comes directly from the 16 volt supply line coming out of the instrument cluster. The signal generator inside the cluster was the problem. We sent it to...
1994 Chevrolet S10 Blazer Tahoe 4.3L Engine VIN: 1GNDT13WXR
hhoolllyy ccooww! we've been in this business a long time and had never seen this before. angelo from ontario nailed it. we pulled the pcv valve from the valve cover and the oil burning stopped. we replaced the pcv valve with a new one and the problem went awa...
1998 Oldsmobile Aurora 4.0L headlights VIN: 1G3GR62C8W
Well hats off to everyone who said headlight switch. I hooked up my scope to the headlamp switch signal wire and watched the voltage drop when the lights started the flashing. Very expensive switch $199 dollars cost but hey car is fixed and I'm happy. Thanks f...
1997 Pontiac Sunfire SE 2.2L Cooling Fan VIN: 1G2JB124XV
Hello again. Thanks to eveyone who replied. You guys hit the nail on the head. After eveyone told me to check the temp that the coolent boiled out and the rad cap. I checked the temp and it boiled out at 218F. so I changed the cap for the second time. I had fo...
1999 Pontiac Grand Am SE 2.4L Hesitation VIN: 1G2NE12T4X
thanks for all of the great information. this car ended up with a partially blocked cat from a previous ignition failure we were unaware of. thanks again for the great information russ
2001 Pontiac Grand Am SE 2.4L Stall VIN: 1G2NE52T91
David [...] wanted to know if we lost fuel or spark when it died. I also wanted to know this. However, when it only dies in traffic, and it is a quad 4 it is hard to...
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