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Prev Professional Automotive Repair Technical Discussions for July 23, 2007
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Open Help Requests for GM
Help Request Answers
1998 Buick LeSabre Limited 3.8L security light VIN: 1G4HR52K7W
Vehicle came in with a no start, found that the anti-theft module was faulty. Installed new module from dealership and vehicle now starts. The problem is the "Security" light keeps flashing about 1 time per second. Looked through our Mitchell program and did a...
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1985 Cadillac Eldorado 4.1L Programmer VIN: 1G6EL5788F
We have confirmed that we need a programmer for this vehicle, however, we cannot find one. This may not be the right place for this type of post, but if anyone knows where we can find this component, we would greatly appreciate it. The programmer number that w...
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1994 Cadillac Fleetwood 5.7L Safety VIN: 1G6DW52PXR
Hello and thank you in advance for any help, We have a 94 Cadillac Fleetwood that starts and the dies out, never fails to crank. When it first came in it would never stay running for more than 3 seconds and then dye out. We pulled the Ignition lock cylinder ou...
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1986 Chevrolet Corvette 5.7L Poor Idle Quality, Surge, Stall
idle hunts from roughly 250 up to 1200 solus says idle should be stable at 550 hot, cold as high as 1300 mass air has been replaced checked both relays mass air reading is 5 to 6 lbs per hr at hot idle ( i will refer to all as hot idle unless noted)injector ms...
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1990 Chevrolet Lumina 3.1L No Start VIN: 2G1WL54TXL
This car came in on a hook about a week ago. The customer stated that it had a no start condition because it kept blowing the injector fuse. The customer also stated that the vehicle did run before all of this happened. I did a visual inspection and found seve...
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1994 Chevrolet Blazer 5.7L Poor Idle Quality VIN: 1GNEK18K1R
Need some GM tech help here! Should be easy i havn't worked on GM's for a while and this is my vehicle and i am trying to set the timing on this Blazer but need to find one thing! Engine label says to "put the distributor in bypass mode by disconnecting the ti...
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1995 Chevrolet K2500 Cheyenne 6.5L Excessive Emissions, Misfire VIN: 1GTGK29F0S
This truck starts fine no smoke but rev it up to 2000rpm it starts to missfire and black smoke code 19 or 18 will set eventually. under load or no load same problem. Engine runs better once ses light comes on. cam offset 0.08. Fuel psi is 4-6psi and will fill ... Trouble codes: 18 (cam sensor), 19 (crank sensor)
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1998 Chevrolet C1500 Cheyenne 5.7L master cylinder VIN: 2GCEC19RXW
Hello gents. I have a vehicle with a spongy brake pedal. We have already replaced the master cylinder, power booster, turned the front rotors and rear drums and replaced the pads and shoes. The vehicle seems to stop better, but still seems to have this spongy ...
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1998 Chevrolet Corvette 5.7L MIL Lamp on, Loss of Power Light VIN: 1G1YY22G0W
This car runs great! Allegedly has 560hp, until the Loss of Power message and MIL come on, then its all over. Customer says it ran great for 1 1/2 years after superchager was installed. I have had it come on for me at start up and on decel after several good r... Trouble codes: P1120 (TP Sensor 1 Circuit), P1221 (Throttle Position Sensor 1 and 2 Performance), P1515 (Commanded vs Actual TP Performance from PCM), P1526 (Commanded vs Actual TP Performance from TACM)
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2001 Chevrolet Malibu 3.1L theft VIN: 1G1ND52J61
Is it possible to by-pass the theft lock cylinder on this style system. This is a fleet vehical and we have replace three ignition lock cylinders and one ignition switch in a years time and still the driver will have to perform a relearn one to three times a w...
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2004 GMC C4500 Topkick C4C042 6.6L Cuts out VIN: 1GDE4C1114
truck will shutdown coolant light on dash lights up first there is also a light a circle with an arrow throuh it truck shuts off as if you turned the key off will restart after30 seconds to one minute any ideas greatly appreicated Trouble codes: 0089 (fuel presure regulator)
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1994 Oldsmobile 98 Regency 3.8L power windows, power seats, interior lighting, eng VIN: 1G3CX52L6R
Car came into shop with problem when you try to roll down window or move drivers seat the car would stall. Noticed when using drivers side switches...windows, seat, door locks the light would come on in the power seat switches. Checked for ground problem, can ...
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1997 Oldsmobile Aurora 4.0L Poor Idle Quality, Cuts out, MIL Lamp on
this one has me stumped car came in on the hook went out with scanner and found no codes cusomer states died and wont start (but it strted and ran for me) found freez frame data for egr voltage low and cleared code customer set up appoint. for 2 days later it ...
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1989 Pontiac Bonneville LE 3.8L Pressure VIN: 1G2HX54C5K
Its like the compressor is flowing backwards. Ok never seen this before. This vehicle came in no a/c, blowing warm, found no freon in system, compressor was cracked. R12 system. Replaced compressor, dryer and orfice tube after flushing system. Added freon, 2.8...
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1996 Pontiac Bonneville SE 3.8L Blower Motor VIN: 1G2HX52KXT
Blower motor runs constant with key on are off. Pulled AC fuse and blower stops running, changed control Panel and Blower Module with used parts still not working. Pulled rap relay thinking power was supplied. Alldata does not list symptom of blower motor oper...
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1999 Pontiac Grand Am SE 3.4L passlock VIN: 1G2NE12E8X
This vehicle will intermittently not start and security light comes on. The passlock cylinder has been replaced. DTC's B2960, B3133, and B3138 keep returning. Before I replace the BCM I would like a second opinion. Thanks guys, Lee
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2001 Pontiac Bonneville SE 3.8L rear air ride VIN: 1G2HX54K61
We have replaced rear air shocks and mounts on this car. It has a noise over bumps in the rear. It sounds like there is a bad mount in the rear. All the bolts are tight and there is no noticeable damage to any components. I did notice the entire rear suspensio...
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2002 Pontiac Grand Am SE1 2.2L No Start VIN: 1G2NF52F42
Come in crank no start, now has hard start cold. It started for us and drove it in. we scope tested the fuel pump (ok), scope test crank position sensor and the pattern was erratic but it would still start for us. Then in the process of checking it out it went...
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Fixes & Summaries for GM
Fix/Summary Answers
2004 Buick Rendezvous CX 3.4L rear diff. pump ck. valve VIN: 3G5DB03E34
Hi All. Thanks to the iATN and all the replies the Rendevous is fixed. I replaced the rear diff. clutch pump actuator check valve and the conector#[...]. This turned off the AWD Disabled display on the dash and all is working correctly. The right output sha...
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1995 Cadillac Seville SLS 4.6L compressor VIN: 1G6KS52Y7S
Thanks to 14 replies received, the general consensus was to delete ACP memory by simply disconnecting the battery - this was the fix. Other replies stated that the codes could be called up and deleted by manipulation of the A/C panel buttons. A thread running ...
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1995 Cadillac DeVille 4.9L Misfire VIN: IG6KD52B25
The customer gave the car back, from where he bought it! I relaced the module it did not help, grouded the engine, no help! Thank you very much for your help]
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1995 Chevrolet Caprice Classic 5.7L starter VIN: 1G1BL82P7S
THANKS TO ALL WHO REPLIED. I REPLACE BOTH BATTERY CABLES AND PROBLEM HAS BEEN RESOLVED. HAVE NOT HEARD FROM CUSTOMER FOR 2 WEEKS NOW.
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1996 Chevrolet Blazer 4.3L abs/4wal
Thanks for all the replies. Phil nailed it right on the head! I was looking for a way to conclusively prove that the modulator had failed, and he supplied the answer. There are two stems that are on the side of the unit that should not move when the brakes ...
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1998 Chevrolet S10 LS 4.3L Poor Idle Quality, Misfire VIN: 1GCCS19X0W
Trouble codes: P0300 (random misfire).
15
1998 Chevrolet K2500 Cheyenne 5.7L no power VIN: 1GCGK29RXW
THANKS FOR ALL REPLIES BUT COME FIND OUT CUSTMER HAD WRONG FUEL PUMP PUT IN TWO WEAKS AGO {WRONG CODE ON PUMP} GOOD PRESSURE BUT NOT ENOUGH VOLUM.
21
1999 Chevrolet Blazer 4.3L a/c VIN: 1GNDT13W6X
thanx for all replies it was the blend door actuator!
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2000 Chevrolet Silverado 1500 5.3L compressor VIN: 2GCEC19TOY
again many thanks to all who took time to answer.as almost everone suggested i drove truck till a c clutch kicked out,with truck still running and ac on,i tapped on clutch and wa la ac came back on.i also cleaned condensor coil and clutch on ac compressor,as m...
16
2003 Chevrolet Silverado 2500 6.0L coolant VIN: 1GCGK29UX3
Thanks for the helpful tips,I decided to go at this one problem at a time, starting with the waterpump gaskets to cure the external leak.The customer is now going to moniter the oil and coolant levels for the time being.Thankyou again for your input.
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2004 Chevrolet Silverado 1500 4.3L starter no crank VIN: 1GCEC19X14
Thanks for all the help the guy tole me he hasnt had any problems since the fuses where installed the only thing i can think of is a problem possible in the fuse block in the eng. compartment, i didnt want to keep this open for to long. He said he will call if...
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1992 Oldsmobile 98 Regency 3.8L Stall, Misfire, MIL Lamp on VIN: 1G3HY53LON
Well its finally fixed. It seems the culprit was the new doorman balancer pulley. Upon a thought from my boss I removed and inspected it. The 3x ring had slipped less than a sixtenth of an inch but more than enough to screw it up. I replaced it with another d... Trouble codes: 42 (esc failure).
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2001 Pontiac Grand Prix SE 3.8L Poor Idle Quality, Poor Fuel Economy, MIL Lamp on VIN: 191F257091
HEY GUYS FOUND OUT THAT THE CAT HAD BEEN GUTTED OUT BUT CUST. WANTED IT TO BE "LOUD" TOLD HIM THAT THE ONLY WAY TO FIX WAS TO GET THE CAT REPLACED. THIS IS WHEN HE TELLS ME THAT THE LIGHT HAS BEEN ON EVER SINCE. JUST TO LET YOU KNOW IT WAS HIS DAD THAT BROUGHT... Trouble codes: P0172.
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2002 Pontiac Grand Am GT 3.4L ecm VIN: 1G2NW12E92
thank you mike from kansas it was the ac/bcf fuse the intake manifold gasket is leaking and shooting a stream of coolant right into the fuse box under the hood i never saw that before after i do an intake gasket this is a total fix thanks for all who replied ...
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2003 Pontiac Grand Am SE2 2.2L No Start VIN: 1G2NF52F83
Hi guys Sorry it took so long .But this car was very intermittent. What I found after driving it asmuch as i could.It finally happened.i would lose my ground on the fuel pump relay.It was the connector in the fuse panel area for the relay about 1/2inch down ... Trouble codes: U1040, U1088.
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