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Prev Professional Automotive Repair Technical Discussions for July 20, 2006
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Open Help Requests for GM
Help Request Answers
1989 Buick Regal Custom 3.1L No Start, run then dies VIN: WD14TXK145
has anyone ever seen this? any help is appreciated, thanks. when initially diagnosing this problem i found there was not spark, so i replaced the ignition control module. turned the key engine started and ran fine, but after 45 seconds or 1 minute the engine d...
1998 Buick Century Limited 3.1L Vibration VIN: 2G4WY52M3W
I received this car because another shop could not locate the problem, however they did tune the car & install a TCC solenoid which actually might have been something we would have done. After some diagnostics & a half hour on the road I understand why they ha...
1996 Cadillac Eldorado 4.6L Low charging VIN: 1G6EL12Y5T
CAr was towed in for no start. Charged battery and checked charging. Alternator output 9 volts @20 amps max. Client informed us this would make 3 alternators in 2 years. Checked for voltage drops battery output to battery.22 volts,ground side is .15 volts. Rep...
1997 Cadillac Eldorado 4.6L Magnsteer VIN: 1G6EL12Y2V
Hello fellow technicians. It was my privelege to be assigned to this vehicle upon my return to work from a back injury.Here s the story I got: The customer recently bought this used vehicle, and he brought it in with a "constant correction" complaint- he had t...
1991 Chevrolet Camaro Z28 5.7L Excessive Emissions, Poor Idle Quality, Misfire VIN: 1G1FP2382M
Hi you Chevy pro's, first of all this car has been all over town before we got it and many parts later. What we have is a miss at idle and at 1700 rpm and after that smooth. No power loss. On the scope looks good, power balance test comes up with low power con...
1995 Chevrolet Blazer 4.3L abs module VIN: 1GNDT13W3S
so i have this blazer that came in with there own parts wanting the brake booster replaced because of hard brake pedal so since he diag his own problem we installed his part but guess what that did not fix hard pedal so after looking over the truck found that ...
1995 Chevrolet Blazer 4.3L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1GNDT13W1S
Helping out the shop foreman here, and hoping to show him the value of IATN at the same time. We suspect a wiring problem. I read thru the archives and found many emissions problems, but none with these codes. We have inspected the wire harness, and are about ... Trouble codes: P0133 (lack of O2 switching), P0171 (lean), P1133 (slow or no switching of O2)
1995 Chevrolet Monte Carlo Z34 3.4L Timing Belt VIN: 1G1WX12XOS
Car was towed in it cut off when owner got on it a little bit. Never seen a timing belt stripped that bad. Some idler pulleys had some wobble so replaced all idler pulleys and tensioners pulley.Got engine running but has a rattle noise that sounds like it is i...
1996 Chevrolet Express 1500 5.7L Air volume VIN: 1GBFG15R6T
Customer complained that air velocity decreases out of the panel ducts at highway speed. I verified this today both on the road and in the shop. As I rev the motor air velocity decreases by about 1/3. I checked the operation of the vacuum motors and all is ope...
1998 Chevrolet Express 1500 4.3L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire VIN: 1GCFG15W6W
Hi all .I have this van that is driving me runs like a bag of crap most of the time It is missfireing but never fires the mil.It even passed mass emissions on the dyno .The car has had complete tune up new cam sensor pulled the distributor to check the...
2002 Chevrolet Impala 3.4L Hesitation VIN: 2G1WF55E32
This vehicle has a bogging down symptom when under acceleration. While driving with scanner on you can go to EGR control and when you start the EGR test while under acceleration the vehicle will be bogging down then when the egr is manually dropped back to zer...
2003 Chevrolet Silverado 3500 6.6L Seal VIN: 1GBJC34123
We have this truck in here that looks to be leaking from the rear seal area. But, it looks more like fuel than oil. Before we pull the transmission I thought I should ask if there is anything in the back of the valley that will leak fuel down into the bell hou...
2003 Chevrolet Suburban 1500 LS 5.3L RF Wheel VIN: 1GNFK16T73
The truck is making a noise from the RF that sounds like a parking pawl is trying to engage. You can intermitantly hear this sound on acceleration. We think that the Solenoid for the 4WD is partially engaged, but can not prove it. Thanks for your help.
2003 Chevrolet Blazer Xtreme 4.3L Brake pedal VIN: 1GNCS18XX3
I have recently replaced the front pads and rotors on this 2003 Blazer. After replacing the pads an rotors I bled the brakes several times and preformed the autobleed procedure with the Modis scan tool. The pedal is firm with the engine off. Once you start the...
1998 GMC K3500 Sierra SL 5.7L Misfire, Poor Fuel Economy VIN: 1GTHK33R5W
Hello, any help would be appricaded. the truck has 178k it shows missfire on three and five cylinders tune up has been done replaced two inj.3-5 replaced both cats went to the cam and crank sensor no help what bothers me the most is the map reading on scan too...
1998 GMC Jimmy Envoy 4.3L Stall VIN: 1GKDT13W5W
Hello everyone, This truck is stalling just driving down the road after it is hot, customer state's that the tach pegs out then back to zero when it shuts down. It does start right back. My boss has it happen once with fuel gauge on it and it did not lose any...
1997 Pontiac Grand Am GT 3.1L Hesitation, Poor Fuel Economy VIN: 1G2NW12M5V
Help me, boys. This vehicle has two customer complaints. First is very gutless on a mild accel. If you press the accelerator hard enough to force a downshift, it accelerates like it should, but with the RPM between 2-3K and trying to mildly accel from 70k to 1...
2002 Pontiac Grand Prix SE 3.1L MIL Lamp on VIN: 1G2WK52J32
We need some help with a car that came in about a month ago. Check engine light is on. Car ran okay (Literally ran smooth). Had the three described codes. Found a blown fuse (IGN1-UH 15amp). Changed fuse, cleared codes, and test drove it with no more problems ... Trouble codes: P0102 (Mass Air Flow Circuit Signal Low), P0141 (O2 Heater Circuit Bank 1 Sensor 2), P0443 (Evap Purge Control Circuit Fault)
1997 Saturn SL2 1.9L cruise control VIN: 1G8ZK5276V
Vehicle came in with complaint of cruise control "funky". Talking to the customer further found out that the vehicle will intermittantly accelerate at a steady pace with the cruise engaged. The cruise will also drop out intermittantly. No DTC's. I drove the ca...
2001 Saturn L300 3.0L No acceleration VIN: 1G8JW52R41
This vehicle will not accelerate. It has code P1516 throttle position error. I can't find much info on this. I checked Alldata, and Shop Key. I don't see very many Saturns in this area, so I am not too familiar with any common problems. Both Alldata and Shop K... Trouble codes: P1516

Fixes & Summaries for GM
Fix/Summary Answers
2003 Buick Rendezvous CX 3.4L lock-up VIN: 3G5DB03E53
Thanks for all the fast replies!! There was a bulletin out for this problem that I did not see in the Aldata database. The number is #06-04-114-001A . It has you change rear end fluid twice with a procedure. It requires VersaTrak fluid which is about $25.00 a ...
1991 Cadillac Fleetwood 4.9L Fuel data center and climate control VIN: 1G6CB53BXM
Thanks to all who replied. Well I tried a third dealer BCM and guess what? It gave me a whole new set of symptoms. The FDC displayed a 'd' instead of a 'c', the blower did not work and the CCP was going crazy. The blend and mode doors were moving back and fort...
1978 Chevrolet Caprice Classic 5.0L No Start VIN: 1N69L8J125
Well this one's fixed. thanks to 37 replies, most were about bowl leaking, fuel line rupture between pump and tank, and a missing anti-drain valve in the fuel filter. I installed the anti-drain valve, resealed plugs in bottom of carb bowl, waited two days, and...
1998 Chevrolet Astro 4.3L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: 1GNDM19W8W
I Replaced distributor and still had to oblong hole to acheive 0 degrees cam retard. replace crank sensor and installed new ignition coil. Cleared random misfire code and drove van another 25miles with no misfires reported. Egr is matching what pcm wants at th... Trouble codes: P0300.
1999 Chevrolet Malibu 3.1L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, MIL Lamp on VIN: 1G1ND52J9X
Thanks guys, you were both right. I checked out the MAF and it was very dirty. I cleaned it up and the car ran good as new. I never would have thought a MAF could trip a code for a Ho2 sensor. I know I will always keep this repair in the back of my mind for th... Trouble codes: P0131, P1133.
2000 Chevrolet Venture 3.4L starter VIN: 1GNDU03E1Y
Thank You all for the replies, The problem wound up being battery acid in the small harness that goes to the crank relay. A little solder and some new wires and all problems gone. Thanks again.
1994 GMC K2500 Sierra SL 5.7L front brake pads VIN: 2GTFK29K4R
Wow! what a huge response I received from all 42 of you who took the time to try to help! Some were more helpful than others but I thank you all! This truck kind of fixed itself. It seems that the more it was driven, the better the pedal got. To the point wher...
2003 GMC Sierra 2500 HD SLE 6.6L No Start VIN: 1GTHK23143
thanks for the advice customer ended up taking it to the dealor and right away they told him you need all new inectors. thats what they did. warranty on injectors is up to 160000 kms also fuel rail pressure regulator is also covered for 160k. i don't know if h... Trouble codes: P1093 (fuel pressure sensor).
2000 Pontiac Sunfire SE 2.2L fans VIN: 1G2JB1243Y
sorry for the delay in closing this request.customer came back 2 days later with coolant smell found water pump leaking out bottom weep hole.seems it was also sucking in air cuasing air pockets.replace water pump bled out air ok at this time.thanks for all the...
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