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Prev Professional Automotive Repair Technical Discussions for June 29, 2006
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Open Help Requests for GM
Help Request Answers
1986 Buick LeSabre Estate Wagon 5.0L accumulator VIN: 1G4BR354XG
Hello all. I have a 1986 Buick Lesabre Estate wagon with a Powermaster III brake system. I need an accumulator. GM part # [...]. This is discontinued by GM which is crazy since they all break eventually. I need help finding one. I have run out of ideas. Ple...
1995 Buick Regal 3.8L MIL Lamp on VIN: 2G4WB5218S
Any info will be greatly appreciated. Trouble codes: 321 (intermittent cam signal), 341 (no 18x ign pulses), 361 (est not toggling)
1996 Buick Century Custom 3.1L Hesitation, Surge, Cuts out, Misfire VIN: 1G4AG55M6T
This one cuts out and misfires under accel and heavy cruise, but only under 1200 rpm. Sets the listed codes intermittently. NOTE: This car is fixed and is being added to the database die to the strangeness of the problem and the mass potenetial for problems i... Trouble codes: P0300, P0336
1996 Buick Skylark Custom 3.1L No Start VIN: 1G4NJ52M4T
Hello fellow GM techs. Need help on this one. Car was dropped off on our late night, went to pull in for the night, car starts and stalls. Pushed car into shop, car starts and stalls a few times and noticed MIL and BATT lights on IPC are very dim. Started car ... Trouble codes: P1573 (PCM/EBTCM Serial Data Circuit - Lost Communication), P1629 (Theft Deterrent Fuel Enable Signal Not Received), P1641 (MIL Control Circuit), C1275 (IPC/PCM to EBCM/EBTCM Serial Data Malfunction), B1049 (SIR 49 History)
1965 Cadillac fleeetwood 472CID wiring/control unit
Hello All, This old caddy( made into a pickup.???.) has no automatic temp control. The unit cooled for a few minutes we shut the car of and now I have no cooling or heat and no blower motor. The fuse is good. I was hoping someone had a wiring diagram or some ...
1997 Cadillac DeVille d'Elegance 4.6L twilight sentinal, interior lights VIN: 1G6KE52Y5V
This 97 Deville will lose it's interior lights and twilight sentinal function in about 15 seconds after starting the vehicle and these functions will not resume until the key has been off for at least 15 minutes. All systems and functions work when you go into...
2000 Cadillac Catera 3.0L No Start, Cuts out VIN: WO6VR54R5Y
Hello to all. I am having a difficult time with a 2000 catera. Here it is in a nut shell. Itermittently more so hot the car will stall and not restart until it cools off. Also if i turn it off after running in my bay it somtimes may not start. Ther is no check... Trouble codes: P0650 (mil control fault), P0135, P0300
1993 Chevrolet G20 Chevy Van 5.0L Hesitation, Surge, Stall VIN: 2GTEG25H5P
help i have anouther van frome hell when engine is cold runs fine when it hits aboute 180 it surges bogs out and stalls ck fuel 8psi replaced fuel pump and filter it wont bog out now but still surges and stalls swaped ecm and distributor same thing no codes sc...
1993 Chevrolet Astro CL 4.3L Poor Idle Quality, MIL Lamp on VIN: 1GNDM15Z6P
This TBI (Not CMPI) astro van has a very bad idle and acts as if the linear egr valve is stuck open. However the datrastream on my OTC scan tool also indicates a MAT reading of -40F on a 100 degree day. This 4.3 dosen't seem to have any IAT or MAT. Is there a ... Trouble codes: 32 (egr malfunction), 43 (knock sensor)
1995 Chevrolet Monte Carlo Z34 3.4L belt VIN: 2G1WX12Y7S
The customer just brought me the car, and i really don't see any of the pulleys missaligned or loose. yet everytime a new belt is put on the car, the outer side of the belt is shredded after a day. I need help.
1998 Chevrolet K1500 Cheyenne 5.7L wipers VIN: 1GCEK19R1W
Customer complains that wipers will not shut off intermittantly.
2000 Chevrolet Blazer LS 4.3L transfer case control module VIN: 1GNDT13W9Y
Thanks for everyones help in advance. I am working on a 2000 t blazer with 4.3 w 4 speed auto and np 236 transfer case.Customer has called a couple of times and stated that the service 4x4 light will come on and vehicle will hesitate. First couple of times we ...
2001 Chevrolet Prizm 1.8L Hesitation VIN: 1Y1SK52801
customer says car hesitates, and after start up car wont take gas.stumbles.and is verry intermittent. doesnt matter if hot or cold, and doesnt seem to have a pattern. i drove car didnt notice any problems no codes scanner information looks normal, has any body...
1991 Geo Tracker 1.6L No Start VIN: 2CNBE18UXM
not sure where to go on this one. customer states vehicle wont start at times and when i went to look at this vehicle it started. so, here is whats happening. when it doesnt start its because the fuel pump relay is clicking steady and when it stops clicking th...
1987 Oldsmobile Cutlass Ciera S 2.5L Poor Idle Quality, MIL Lamp on VIN: 1G3AJS1R7H
Very hi idle at times. codes24, 35, 33, 34. if I remember, the idle can be affected if there is no speed sinal. It has a cable and the vss is on the speedo. The speedo works. Scanner shows no speed. According to wiring diag. the ecm supplies 12 volts ref to vs...
1989 Oldsmobile Cutlass Ciera 3.3L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 2G3AJ51N4K
This car sat for about a year before it was given to me. It did not run at all. The battery was shot, I replaced it. There was very little fuel pressure, I replaced the fuel pump. Then the engine ran very rough, I found 3 shorted injectors, which I replaced. T...
1990 Pontiac Bonneville LE 3.8L Cuts out, Stall, MIL Lamp on VIN: 1G2HX54C6L
Vehicle stalls after take off, Check engine light comes on and goes off while driving. Sometimes it runs fine for miles until car is stopped and on take off will either stall or hesitate badly or drive fine. Check engine light comes on and it drives well light... Trouble codes: 34 (Mass Air Flow sensor Circuit Gm/SEC Low)
1995 Pontiac Grand Am SE 3.1L Stall VIN: 1G2NE15M5M
Dear Techs. This Grand Am is driving me crazy. It was brought in on a flatbed, because the customer said it would only run a few seconds at a time. Easy enough right? Wrong. It started and drove into the shop running good. Hooked up the fuel pressure gauge and...
2000 Pontiac Grand Prix GT 3.8L MIL Lamp on VIN: 1G2WP52K5Y
Hi Guys! I have had this vehicle into my shop occasionally and have seen a stored DTC PO128 for cooling system temp below threshold value. Since the complaint seemed to be intermittant I replaced the thermostat and gasket first trip in. Next trip (still interm... Trouble codes: P0128

Fixes & Summaries for GM
Fix/Summary Answers
1966 Chevrolet corvair 3.0L flywheel
i would like to thank all who replied to my post . i gave my customer a quote based on 8 hours because i remember the underside of this thing had been very rusty when i did the brakes on it years ago . i can always adjust the price if things go better than the...
1994 Chevrolet C1500 Cheyenne 4.3L Hesitation VIN: 2GCEC19Z8R
First of all thanks to everybody that had a response. I found out that this particular symptom can be caused by a multitude of issues. We fist checked fuel pressure 11 lbs, prior shop had replaced fuel pump because they thought that was not enough. We tested 2...
1996 Chevrolet Blazer 4.3L Misfire VIN: 1GNDT13W3T
ty to all who responded to this.as stated i slotted customers dist hold down to get within spec's.customer declined new delco distributor.just for our own info we installed another dist from a low mileage vehicle same dist # same result.and no it's not a tooth... Trouble codes: P0300.
1997 Chevrolet Tahoe LS 5.7L fuel gauge VIN: 1GNEK13R4V
thanks for all the help- the fix is the installation of a anti slosh module- iatn is great
2000 Chevrolet Silverado 1500 5.3L r.f. wheel sensor VIN: 2GCEC19TXY
o.k. its fixed.the first thing i learned from the guy in VA. BEACH,VA is that when monitoring wheel sensors to monitor them with the scanner is not good enough.the code was for erratic r.f.wheel sensor. when looking at just scanner the MPH on all three sensors...
2001 Chevrolet Express 1500 4.3L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GCFG15WX1
ok calling this fixed. after putting on a maf the next morning it ran fine until secound road test and it started again. fuel pressure still good even as it acts up(60-65psi. open drain on gauge while running as suggested. hose in container and put out a qtin ... Trouble codes: P0131 (p0151-), P0151 (testing and results).
1996 GMC K1500 Suburban 5.7L abs VIN: 3GKFK16R4T
sent to dealer for further diagnoses w/ scan diagnostics felt like may be a communication problem also.??? he's a good customer so he understands.(i guess) thanks for the help
2001 GMC Savana 2500 5.0L Poor Idle Quality VIN: 1FTGG25M11
Hi guys well I did not fix this one...the body shop decided to let it go to auction. If I had to guess as to what the fix would have been I would have leaned towards the intake leaking on this one as it appears to be a common problem. I thank every one for try... Trouble codes: P0507, P0300.
2003 GMC 7500 8.1L Stall VIN: 1GBM7J1E33
upon further testing, i found the fuel pump was cavatating due to both suction screens were plugged inside tank. removed tank and dissassembled electric pump assy and cleaned socks. washed out tank and reinstalled. all ok. thanks to all replies. test results w...
1998 Oldsmobile Silhouette GL 3.4L abs VIN: IGHDX03EXW
someone installed the wrong power booster and was keeping the brakes on all the time. i didn't know this untill the customer came and told me
2002 Oldsmobile Alero GLS 3.4L ABS module VIN: 1G3NF52E62
Thanks to all who replied, Turned-out to be a SECOND grond tree way in back of engine that was tucked-up and we just could not see. ABS system now works great. Special thanks to Mark [...] from downunder for all his help. Thanks all, Monte
1992 Pontiac Grand Am GT 3.3L Cuts out, Stall VIN: 1G2NW14N7N
Hi Group,Got 10 replies on this.I'm very sorry I did not mention that the booster was ck'd & OK.The problem was a bad ground to the fuelpump connection.I added a ground wire to the pump harness under car & it works great.Thanks James,Dale,&Emmerson for leading... Trouble codes: 26 (quad driver module), 27 (2nd gear switch), 28 (3rd gear switch).
1997 Pontiac Sunfire SE 2.4L alternator VIN: 1G2JB12TOV
thanks again for everyones help. after trying a new ac delco alternator and having no luck with that we replaced the wire from the alternator to the starter which then runs to the battery. this wire fixed the problem, we found that we had battery voltage there...
1997 Saturn SL2 1.9L Mechanical VIN: 1G8ZK5273V
Sorry for the delayed response. The new expansion valve fixed this car. Pressures came into line and temp is at 48 degrees.
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