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Prev Professional Automotive Repair Technical Discussions for March 6, 2007
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Open Help Requests for GM
Help Request Answers
1998 Cadillac Catera 3.0L abs VIN: W06VR52R3W
thank you in advance. procedures replace ebcm. in alldata info. require to replace new scews and waves spring, but ebcm. does come with new scews but not wave springs. please help and advise, thank you
1993 Chevrolet Lumina Euro 3.1L Excessive Emissions, Poor Idle Quality, Hesitation, MIL Lamp on, VIN: 2G1WN14TXP
scanner always reads -40 on both temp sensor and mat sensor i tried used computer same results when i ohm the mat and coolant sensors i get an ohm reading with computer connected but when i disconnect i lose all readings which leads me to believe my wiring is ... Trouble codes: 15 (temp signal high), 17 (crank signal shorted), 35 (iac problem), 36 (dis fault extra or missing est pulse), 43 (est module circuit problem), 51 (ecm prom error)
1995 Chevrolet Blazer 4.3L transfer case VIN: 1GNDT13W9S
We have a 95 S-Blazer that is making a growling noise when transfer case is in 2wd. Almost sounds like a bad wheel bearing. Noise goes away instantly when switched to 4x4. Unable to detect noise when running on hoist. Remove front differential and disassemble,...
1998 Chevrolet Camaro Z28 5.7L Hesitation, Surge, Misfire VIN: 2G1FP22G3W
Hello GM techs, This is my 1998 SS Camaro and I dont much time to work on it. It has misfires on cylinders 1 and 6. The misfires are present more so at an idle and sometimes from an acceleration that comes from a deceleration when driving, not really present a... Trouble codes: P0101, P0300
1999 Chevrolet S10 LS 4.3L cooling system VIN: 1GCDT19X8X
car temp is normal on level driving, but overheats after climbing hills and when owner reaches home water is boiling in overflow. flushed cooling system. replaced radiator, thermostat, and clutch fan. no changes. any info on this condition is appreciated.
1999 Chevrolet Camaro 3.8L hard start hot soak VIN: 2G1FP22K5X
hello GM techs,customer brought in the vehicle with a hard start after hot soak,cold start no problem,checked fuel pressure,was @ 40psi a tad under specs but that shouldnt cause this problem,i suggested the fuel pump and installed a factory pump/module assembl...
2000 Chevrolet Astro 4.3L No Start VIN: 1GNEL19W9Y
i have 2000 astro, van came in with no start. ck fuel pressure and spark, fuel pressure at 61 lbs, no spark. ck engine codes and p1351 stored in memory. did basic checks on secondary ignition. checked a/c voltage at ignition control module, no voltage. ck a/c ... Trouble codes: P1351 (ignition control circuit-high voltage)
2000 Chevrolet Blazer LS 4.3L transfer case VIN: 1GNDT13W1Y
put in 4wd intermittently kicks out & grinding noise from transfer case. system has insta track 4wd
2000 Chevrolet Suburban 1500 LT 5.3L Instrument cluster VIN: 3GNFK16T7Y
When you start the vehicle the ABS and Airbag lights stay on, the PRNDL display does not indicate what gear it is in, the message center switches from Battery to Security to Service 4WD continuously, and the fuel guage goes from empty to 1/4 to empty. I have c...
2001 Chevrolet Malibu 3.1L no start VIN: 1G1ND52J16
Problem is related to passlock system. Fuel is being shut off at injectors. Spark is continuous during cranking and fuel pressure right on spec. "Theft system" lite blinks continuously w/ key on. Coolant lite off. All fuses to system ok. Have checked 3 wires t...
2002 Chevrolet Silverado 1500 5.3L reverse lamps VIN: 2GCEK19T32
This is my pastors vehicle so you can imagine the guilt I feel(ha ha). I just replaced the transmission with a used one (4L60E) and at the same time I had to replace the pigtails and the PRNDL switch. They were glued together. I do not recall any reverse lam...
2000 GMC Jimmy Diamond Edition 4.3L Stall VIN: 1GKDT13W3Y
All Systems & Gauges Ect Read And Act Normal - Engine Shuts Off At Will - Restarts Fine
1999 Pontiac Grand Prix GTP 3.8L Misfire, MIL Lamp on VIN: 1G2WR521XX
Thanks in advance for any help. I have been working on this car for a used car lot on and off now for a month. It is a Pontiac Grand Prix GTP. The problem is that the #3,#6 coil pack does not spark. I have moved coil packs and problem stays in same spot on Ign... Trouble codes: 300 (random miss)
2004 Pontiac Grand Prix GT2 3.8L Cruise Stops Working VIN: 2G2WS52294
Vehicle comes into local shop with cruise control that stops working. I assist the owner with the diagnostics. Using eSI & alldata, go through trouble trees and perform testing. Using the BDM, AutoEnginuity & Snap-On MT2500 the only cruise PIDS available on SO...

Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick Park Avenue 3.8L auto heat control VIN: 1G4CW52K4T
thanks for everyones help on this it was the blower motor control module replaced and car has had no trouble since.thank you.
1992 Cadillac Seville 4.9L No Start VIN: 1G6KS53B1N
Everyone knew the ground strap under the coil was missing. The young guy working on this just finished school. Therefore, I should have looked a little closer. Thank you!
1999 Cadillac DeVille 4.6L ride hieght VIN: 1G6KD54Y4X
Thank you everyone for your help. I have replaced the rear shocks and the rear hieght sensor. I still have the whole left side sagging. the car will be returning to the dealership for more repair.
2000 Cadillac Catera 3.0L Misfire, MIL Lamp on VIN: W06VR548YR
Well once again the majority of responses were correct-the cam timing on the affected bank was off 3 teeth.The issue on the update of the HO2S heater circuit fault was the #43 fuse (#17 cavity) in pcm fuse box.Did not have the tools to hold the cams in place a... Trouble codes: P0300 (random cyl misfire), P0301 (cyl 1 misfire), P0303 (cyl 3 misfire), P0305 (cyl 5 misfire).
1986 Chevrolet Celebrity 2.8L wipers VIN: 2G1AW19W0G
Ok, Joe, James, Tony, Alain, Christopher, Nick and the entire network. Do I have a story to tell you!!! First of all, I do appreciate all of your responses. After completeing and verifying your ideas, that eleminated 3/4 of my ideas. Yes, I made sure that the ...
1990 Chevrolet Cavalier 3.1L rad fan will not com VIN: 1G1JF11T8L
Thanks for all the responses.It was the wires for the ac part of the circuit that turn the fan on when ac is on.Somebody had cut these wires and spliced different ends on.To fix without spending a fortune on this old car we grounded the relay. the fan will com...
1997 Chevrolet Tahoe 5.7L No Start VIN: 3GNEK18ROV
thanks to everyone that replied. it turns out spark was not as good as i thought. after double checking everything i find the ign coil driver module isn't doing its job. swapped in a new one and it runs like a champ. again thanks to everyone.
1998 Chevrolet Cavalier 2.2L abs VIN: 1G1JC5243W
Late closing. sorry about that. Got a second used module in and had same problem. Don't suspect 3 in a row. I also suspect that Patrick from BC is on the money with the motorpack. However, customer has decided to live without ABS for the moment. Thanks for the...
1999 Chevrolet Cavalier 2.2L MIL Lamp on VIN: 3G1JC1246X
Thanks all you guys, 1. used ecm 2. put in 3.try starter won't 4.let key on 5 get samthing to eat 6 came back start 7 go drive ok 8 go to emmission test 9 pass happy todos 10 call customer, the rest you know that Trouble codes: P0405, P0404 (EGR Recirculation circuit low).
2000 Chevrolet Malibu 3.1L engine VIN: 1G1ND52J2Y
Well, I think that the ghosts were alive and well with this one. After replacing the crank sensor, the cam sensor, pulling the front valve cover gasket, doing a leak down test, a compression test, pulling what remaining hair we had left it was discovered that ...
2002 Chevrolet Suburban 1500 LS 5.3L charging system VIN: 3GNEC16ZX2
Thanks for all that replied. The fix was an alternator. Something in the regulator was pulling down the 10v signal from the pcm. We replaced the alternator with a reman unit is all is working properly.
2002 Chevrolet Impala 3.4L Engine VIN: 2G1WF55E12
Well This ones off to the dealer, still under warrenty. Frank and Robert both nailed this one, plugged Catalytic Converter forcing exaust between the manifold and head. Remarkable the car ran as well as it did. Thanks to everyone that took the time to reply.
2001 Saturn L200 2.2L engine VIN: 1G8JU52FX7
The poor oil change maintenance on this vehicle has doomed the tensioner, caused the chain to jump several teeth and bend many valves. Upon further inspection, the thing had not had an oil change in over 10k miles, on its way to being fixed, very expensive les...
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