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Prev Professional Automotive Repair Technical Discussions for December 17, 2004
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Open Help Requests for GM
Help Request Answers
1990 Buick LeSabre 3.8L Hesitation, Misfire VIN: 1G4HR51C8L
Hi gang, got this car from the dealer, as they couldn't fix it. I've never met a Buick I couldn't fix, but this one is opposite of others. When it came in, it was hard to start cold and would misfire at slow speeds and under light load. It has new plugs and wi...
1992 Buick Roadmaster 5.7L temp guage VIN: 1G4BN5371N
hello, car came in with the temp guage running hot and cold with quick changes, new thermostat, new coolant , new temp sensor for guage, computer temp sensor reads 190-195 steady all the time. this problem only happens when driving down the road not in the sho...
1992 Buick Park Avenue 3.8L heater VIN: 1G4CW53L1N
hello fellow techs. this vehicle is a friends at work. it has always had really bad heat. so it came in a week ago for a coolant leak at the intake. i repaired this item but was asked to check also the lousy heat. when running with cap off you get good heat. s...
1994 Buick Skylark Custom 3.1L Hesitation, Stall VIN: 1G4NV55M4R
Goodmorning all! I have this Buick that will start and run for about 5 to 10 seconds and than die. If you pump the accelerator rapidly, after it starts it will continue to run but if you hold it open steady it will eventually die. I have swapped out the MAP, O...
1991 Chevrolet Lumina Z34 3.4L Excessive Emissions, No Start, Poor Idle Quality, Stall, Misfire VIN: 2G1WP11X2M
Hello Tech's the customer tried his own repair on this car first. he claims it started loosing power as he was driving and the mil light came on . he had a code 42 and thought the module would repair it. he then cleared the codes so I'm not sure of any other c...
1991 Chevrolet Cavalier RS 3.1L Poor Idle Quality VIN: 1G1JF11T2M
We did a used engine swap as our clients engine block cracked. Old engine ran very well prior to block cracking. Our problem is that engine has slight misfire at idle and up to 2000 RPMs whether revved in neutral or when driving. The problem shows as a vibrati...
1992 Chevrolet G30 Chevy Van 7.4L Surge, Cuts out, Misfire VIN: 1GBKP37N3N
This vehicle has tbi and I was wondering if anyone has the spec on what wot injector pulse width would be?
1994 Chevrolet Van G10 5.0L no overdrive after rebuild
Customer returned tranny with same complaint as before rebuild.No overdrive and no downshift braking.What is the problem???
1995 Chevrolet G10 Beauville 4.3L Poor Idle Quality, Cuts out VIN: 1GCDG15Z5S
Todays problem has our whole shop stumped. This van will start to run poor and stall after start up or after driving awhile, it happens fairly consistantly. While watching the scanner our iac counts will fall to 0 and the van will stall. starts right back up a...
1996 Chevrolet Corsica 2.2L heater VIN: 1G1LD5546T
this is a used car sold few months back. came in with complaint of low/no heat. heater case was broke due to someones attempt at replacing heater core prior so we replaced with new case cover and new core. one in car had tubes bent and cover would not fit well...
1999 Chevrolet Cavalier 2.2L cv joint or bearing noise VIN: 1G1JC1249X
Chevy guys, If you are driving between 40 and 70mph, just the slightest left hand turn you hear a humming noise from what appears to be the left front..tough to tell where it is coming from exactly. Driving straight or to the hum.We replaced the l...
1999 Chevrolet K1500 Suburban 5.7L brakes VIN: 1GNFK16R9X
This is my own vehicle. when braking at low speeds ( pulling out of drive way, pulling into parking spot,coming to a stop under approx. 30 mph) the pedal sinks and you can hear the abs pump kicking in. problem was very intermittent to start, after it started t...
2000 Chevrolet Impala 3.4L Gauge Cluster VIN: 2G1WF52E6Y
Hey fellow techs, I had a Malibu towed in, died on the highway. The customer stated that it would crank and not start, but the battery was completely dead when it got here. The batterywas original, did not want to charge at all so I installed a new battery. Th...
2000 Chevrolet Express 1500 5.7L MIL Lamp on VIN: 1GBFG15R0Y
came in with p0430 both cats ratteling replaced with reman cats. ran matorvac R&R fuel filter rd. test returned to cust. took van to calf. light came back on in calf. (1900 miles) back in our shop same code scope o2's bank 2 lazy to respond others responding g... Trouble codes: P0430
2002 Chevrolet Silverado 2500 HD 6.6L codes VIN: 1GCHK29122
hello 1st time user needs advice.i don't think the pressure switch code[p0848] is caused by a slip but what is the easiest way to increase pressure to help hold clutches in hard pulling conditions in 5th gear. the performance chip is the reason for the ratio c...
2000 Oldsmobile Alero GL 2.4L Steering VIN: 1G3NL52T8Y
Good evening everyone The car that I am working on has a noise which I believe is coming from the power steering system.When you make a hard left turn it makes a whinning sound that you get from a pump that is going bad.The problem is it dose not do it when yo...
1994 Pontiac Bonneville SSE 3.8L Heater VIN: 1G2HZ5215R
Hello Well this one came in for no heat. I expected to find a bad thermostat but that was not the case. I let the car idle in the bay for 15 min. and had good heat. Suspecting a tough and expensive automatic control problem I suggested the customer check with...
1997 Pontiac Grand Am SE 2.4L Balance shaft VIN: 1G2NE12T6V
Hello all, I have 2.4 GM engine that I am trying to set the balance shaft timing. GM does specify a special tool #j38122 to hold the balance shaft in the correct position. Does anyone know of a way to set this without the special tool? Thanks in advance fo...
1999 Saturn SL2 1.9L MIL Lamp on VIN: 1G8ZJ5272X
We have a new saturn module,wires and plugs installed and cleaned all the necessary grounds and have a reoccuring cam sensor code. The 5 volt square wave brown/white wire, the cam sensor signal is very erratic at higher rpms and I* am assuming this is my probl...

Fixes & Summaries for GM
Fix/Summary Answers
1988 Chevrolet K2500 Cheyenne 5.7L Hesitation, Surge VIN: 1GCFK24K3J
we believe that the vehicle has a problem in the distributo, however the vehicle has not returned yet, (he needs it to plow snow) thank you ken Trouble codes: 43 (esc sensor error).
1993 Chevrolet S10 Blazer Tahoe 4.3L Hesitation, Misfire, shutter on accel VIN: 1GNDT13W8P
Thanks to all who replied to my request for help. I received notices as to 1. Bad plugs & wires. (The owner had replaced all prior to bringing it to me and & I removed all again and rechecked them and replaced all bad ones as noted on my request) 2. Bad cap, r...
1993 Chevrolet K1500 Cheyenne 5.7L soft brake pedal VIN: 2GCEK19K8P
Life sure is a learning experience.Experience is stay away from stuff like this.Thanks everyone for the help.Yep we had to change and flush every component.A heck of a mess but what can you do? The major problem was with the proportioning valve with the soft b...
1996 Chevrolet Cavalier 2.2L Engine VIN: 1G1JC1241T
Its FIXED! 20 mile test drive at O dark 30 this AM and scan tool says 225' maximum before ECM kicks the fan. Huge kudos to all that replied. It is quite comforting to know I am not alone and there are others out there whose thinking parallels my own. When I gr...
1997 Chevrolet K3500 6.5L power steering VIN: 1GDHK33F6V
I went to use the tech2 on a twin of this truck. Just for fun I tried doing the same turning and it did it as well. I then tried two other simillar trucks and came up with the same results. After replacing nearly everything in steering system, it turns out tha...
2001 GMC Sierra 1500 SL 4.3L No Start, extended crank VIN: 1GTEC14W21
We knew the fuel pump was not holding pressure so we went ahead and replaced it. Fuel pressure now holds and the vehicle starts and runs like new. Thanks for the replies!
2003 GMC Savana 2500 6.0L none VIN: 1GTGG25U03
thanks to everyone for their replies-customer never came back -almost every one said computer need to be reprogrammed.
1998 Pontiac Grand Prix GTP 3.8L Stall VIN: 1G2WP5218W
hello everyone sorry it took so long too post. this car was repaired within hour of my request. thank to everyone who replied, and yes the fuel pump resistor was the cause of this car problems. thank to duane who replied in 20 min of my post. stan & brian who ... Trouble codes: P1629 (theft deterrent malfunction).
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