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Prev Professional Automotive Repair Technical Discussions for July 12, 2006
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Open Help Requests for GM
Help Request Answers
1994 Buick LeSabre Custom 3.8L Cuts out, Misfire VIN: 1G4HR5214R
HEY PEOPLE! This one is a good one. This car acts like cat is plugged intermittantly, but its not. When you drive to 45 MPH and let off throttle then try and ease back in to the gas it feels like it dropps 3 cyls, and wont accellerate. You floor the pedal and ... Trouble codes: 604 (quad driver failure)
1996 Buick LeSabre Limited 3.8L Hesitation, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G4HR52KXT
Vehicle came in for Ac Service. Got that done and test drove vehicle, it started missfiring and hesitating very badly. Almost feels like a bad MAF sensor- The MAF checked good, but I tried a new one anyway. It did not do a thing. Also the reading on my slios f... Trouble codes: P0300
1991 Cadillac other 4.9L No communication
This is a 1987 Pontiac Fiero GT with a 1991 Cadillac 4.9 motor and ECM. This is a professional installation, and the customer has had the car for about a year with no problems. Customer brought vehicle in for intermittent "hunting for idle" when coming to a st...
1977 Chevrolet Corvette 5.7L turn signals VIN: 1Z37L75445
Hello everyone and thanks in advance for the help. I have a 1977 Chevy Corvette in the shop (real work of art) and the turn signals are not flashing. I have no wiring diagram, as Mitchel does not offer that far back. I have found the flasher after tearing the ...
1984 Chevrolet Corvette 5.7L MIL Lamp on VIN: 1G1AY0784E
Hello Gentlemen But I get this corvette in from customer and it has a code 42 ESC , Customer has already replaced the igniton module Cap Rotor plugs and wires and Fuel Injectors with parts from the dealership. I ran all the test for this code 42 and it tells m... Trouble codes: 42 (esc)
1991 Chevrolet S10 Blazer Tahoe 4.3L No Start, Poor Idle Quality, Hesitation, Stall, Misfire VIN: 1GNDT13Z3M
hey fellows 1991 chevy blazer s-10 4x4. hard to start. hold accelrator padle to floor to start. do not idle. if force to run hesitate. no power and back fire. new spark plugs, wire,cap and rotor. replaced used distributor. new idle air control motor.chek fuel ... Trouble codes: 24 (vehicle spped sensor), 13 (o2 sensor), 33 (map sensor)
1997 Chevrolet C1500 Cheyenne 5.7L Detonation VIN: 2GCEC19R5V
GM Gurus: This truck has a moderate spark knock while cruising at 60 mph and slightly accelerating. The Scan Tool shows 4* Knock Retard and Knock is stil audible. All other parameters OK. Ignition System New Dist., Cap, Rotor, Wires, Plugs. Suspecting Carbon ...
1997 Chevrolet C1500 5.0L No Start VIN: 1GTEC19M2V
Hi all, Got this truck on the hook. Came in no start. Found fuel system has no pressure. Fuel pump circuit not working. Found out fuel pump has wiring harness shorted near fuel fitler area. Got the fuel pump working now, but truck would not start with a stead...
1999 Chevrolet Cavalier 2.2L overheats VIN: 1G1JC1243X
Simple question, followed by the explaination. Will reflashing the PCM reset the temp at which the PCM commands cooling fan operation? This is my car. I bought it with a bad head gasket 2 years ago, did it up right pressure tested, valve job new bolts, every...
2000 Chevrolet Silverado 1500 5.3L power assist VIN: 1GCEK19T7Y
My accountant brought me his 2000 chevy pick-up.The problem is that it has very low power assist at idle.No codes.If you just bump the idle slightly it starts to come back to life.I am 90% sure this is just a weak power steering pump,but I havent seen this pro...
2002 Chevrolet Astro LS 4.3L No Start VIN: 1GNEL19X62
Vehicle came in for a good crank, no start,Tried several times over two days and had no problems.Today I noticed the Mil lamp doesnt light when you turn the key to on.I can command it on with the scan tool,any ideas why the light doesnt come on? and does it ha...
2003 Chevrolet W3500 Tiltmaster W3S042 4.8L fuse's VIN: J8BB4B1443
help have this chevy w3500 box truck. the boby is bulit by isuzu. the problem i have is there four fuse in the fuse box behind the golve box that has no power on either side. we have mitchell,identifix, can't seem to find any wiring diagrams. can't find anythi...
2003 Chevrolet Silverado 2500 6.0L No Start, Cuts out, Stall VIN: 1GCHC24U53
This thing is driving me crazy. This truck will run good until it gets hot and this is starts cutting out and finnally dies and does no restart until cold. It has injector pulse but will not fire the coils. It has power to the coils but no ground from the comp...
2003 GMC Sierra 2500 HD SLE 6.6L No Start VIN: 1GTHK23143
Hi GM Techs i been working on this sierra with a problem restarting after a hot soak, it runs fine lots of power. I have a tech 2 and i am able to command max pressure i believe was 160 mpa, idle is 34 mpa fuel reg. flow is 2600mm3 at idle. When it doesn't sta... Trouble codes: P1093 (fuel pressure sensor)
1990 Oldsmobile Delta 88 Royale 3.8L speedometer VIN: 1G3HY54C31
Hello all, Back from vacation;rarin' to go and I get this old timer! Customer complains of a clicking noise from the dash when driving;at first I thought it might be from the heater controls but it does not click when the car is not moving. I feel pretty sur...
1947 Pontiac 4 door sedan 350CID clock
This 47 Pontiac brought to our shop after owner became disillusioned with previous shop. he asked us to do some minor repairs, one being could we fix the clock. It has had the wires cut to it, it is the original 6 volt clock. Jaeger was the original manufactur...
2001 Pontiac Grand Prix SE 3.8L Speedo VIN: 1GZWP52KX1
Customers concern was speedo inop... Simple... NOT. 1st I scanned the car no faults 2nd road tested with scanner MPH reads on scanner, Bad connection... NOT!!! Bad Cluster... NOT!!! Before replacing cluster with a GM reman I checked powers and grounds OK. Mitc...
1994 Saturn SL 1.9L oil loss VIN: 1G8ZF5594R
hi,question for the saturn people out there, i have a 1.9 sohc, burns oil on start up clears itself out after 15 min of driving. originally timing chain broke,removed clyinder head had complete head reworked (valves,guides,seals ect.) pcv valve unplugged from ...

Fixes & Summaries for GM
Fix/Summary Answers
1999 Buick Regal LS 3.8L instrument cluster VIN: 2G4WB52K3X
3 of 4 responses have indicated to replace the instument cluster. We have replaced the defective cluster and all guages are working.
1982 Cadillac Fleetwood Brougham 4.1L ecm VIN: 1G6AB6989C
thanks for all the replies! I replaced the oil sending unit plug and it started up and ran great!! I was under the car and I had dejavu moment. I fixed this problem before when I own a caddy, 15 years ago, along with everything else on the car. thanks again ...
1997 Chevrolet Cavalier 2.2L Poor Fuel Economy VIN: 1G3T5678LO
Thank to everyone I did replace the injectors and the problem is solved. Thanks again AL.
2001 Chevrolet Impala 3.4L Poor Idle Quality, Misfire VIN: 2G1WF55E71
First of all thank you to everyone that took the time to respond to this post. After many grueling hours of switching plugs,wires injectors and even lifters from one side to the other (by the way tech 2 data showed misfires on #1,3,5 with 1 and 5 being the pre... Trouble codes: P0300.
2002 Chevrolet Impala 3.4L Cooling Systems VIN: 2G1WF52E62
Thank you so much for the 16 responses. The vast majority aimed at the common intake failure. A couple were concerned about faulty trans coolers in the rads along with a possibility of head gasket failure. The oil was definitely engine oil and there were no he...
2003 Chevrolet Tahoe LS 5.3L oil pressure sender VIN: 1GNEK13T63
Customer never returned...Replies varied from 'difficult, but not impossible' with the intake on to 'must remove intake' Those who did it with out removing anything used a combination of swivels and extensions and a little bit of contortionism.
1995 Oldsmobile 88 Royale 3.8L MIL Lamp on VIN: 1G3HN52K8S
i just want to say thanks for all the help guys . I had my r@r guy replace the engine for me and he told me there was only one knock sensor , but there was really 2 and he had the wire pinched. after i looked for myself i found it so thanks again. RON Trouble codes: P0325.
1997 Pontiac Grand Prix GT 3.8L overheats VIN: 1G2WP52K5V
Well, I finally got to speak with customer regarding the responses I received. The majority (7) agreed that temp and cooling system are 'within normal range' and that it is probably a restriction in either radiator or A/C condensor. One suggested verifying act...
2002 Pontiac Aztek 3.4L Blower Motor VIN: 3G7DA03EL2
Ihave not seen this aztec back thanks to everyone who replyed all this turned out to be was dirty connections at blower fuse in main fusebox when the blower would stop i lost all power just as if a blown fuse so i looked at the back of fuseblock and seen a mes...
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