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Prev Professional Automotive Repair Technical Discussions for July 16, 2005
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Open Help Requests for GM
Help Request Answers
1992 Buick Regal Custom 3.8L Starting VIN: 2G4WB54LXN
Vehicle runs good no codes. Stop car and try to restart,will crank with no restart. Fuel pressure ok 46#,no spark. Let set and restart after 1/2 hour.Runs great until stopped again and will not start again.
1997 Cadillac DeVille 4.6L Misfire, MIL Lamp on
i am baffled by this one!! the car has a misfire in the morning at startup then it goes away it has missfire codes for cyl's 1 & 3 only. the fuel pressure is perfect. the spark output is good and so is compression. the vehicle has all new injectors ,fuel press... Trouble codes: P0301, P0303
2001 Cadillac DeVille DTS 4.6L Mode Actuator & Doors VIN: 1G6KF57991
Checked codes and data, data shows command and actual readings are not matched for a/c / defrost mode door and air inlet door. Located faulty a/c / defrost mode door actuator but I am unable to get the new one working properly. I know I am having a hard time b...
1995 Chevrolet Blazer 4.3L OBD I info retrieve VIN: 1GNDT13W65
Hello Techs, I have a 95 Blazer OBD I with a OBD II DLC (test connector). I can't talk to or retrieve any info. Has someone seen this before? Can I rewire with OBD I DLC? My scanner (tech 1A) powers up but no communication. Sticker under hood indicates OBD I. ...
1995 Chevrolet Lumina APV 3.8L Hesitation, Surge, Cuts out, Misfire VIN: 1GNDU06L2S
Need some vetran help! This van has a severe cut out on light accel. & is worse the hotter it gets. Using a snap-on scanner & taking a movie, I can see the MAF go to 0 for a few frames, the pulse width freeze at 6.4 & then goes to 30, the load percentage flucu...
1996 Chevrolet K1500 Suburban 5.7L No Start VIN: 3GNFK16R5T
ok this is my wifes truck it sat for 4 days on the fourth day i tried to start . crank speed normal no start pulled a plug it was fuel fouled replaces all the plugs hit the key and it fired right up it did great for a week then the same thing happened this tim...
1999 Chevrolet K1500 Suburban 5.7L power accy circuit breaker A shorting VIN: 3GKEC16R0X
I have this 99 Suburban that has power door locks and both front power seats inop. I found the power accy circuit breaker A in left fuse block tripped. I checked from there to ground with an ohm meter and I have 0.3 ohms. So I do have a short. I found that to ...
2000 Chevrolet Venture 3.4L starter VIN: 1GNDX03E9Y
hi yo everyone,this van came in running but knocking badly and no oil pressure. i installed a 30000 mile used motor now van will not crank, i have no serial data,no voltage atpin #19 ign pos , no crank voltage on pin#23. do have all pcm grounds at pcm and cran...
1972 GMC C2500 350CID overflow tank VIN: TCE2421522
hey folks , I have a sneaky feeling I'm overlooking something but I don't think so .This truck has a newly rebuilt motor and trans.Problem is that coolant will purge into the overflow but won't suck it back .Have tried a few new caps ,no leaks ,tests negative...
1995 GMC Safari SLE 4.3L Unknown VIN: 1GKDM19W5S
Hi GM Techs, I have this Safari driving me daffy. If you hold the ign. switch in the start position it will crank and crank normally.(No Start) However, if you turn the ign switch until the starter engauges then immediatlly release it to the on position it wo...
2001 Pontiac Grand Am SE 3.4L No Start, MIL Lamp on VIN: 1G2NF52E41
Hello All Tech- Again this is my Sonís car and again I am about ready to yank more hair out over it . We have gone thru replacing the Anti-Thief tumbler about 12 months ago but this acts different anyway Ė - Here whatís happening and all is all intermittent -...
2003 Pontiac Vibe GT 1.8L Cooling VIN: 5Y2SN62LX3
Hello fellow members and thank you for the help in advance. I have this Pontiac Vibe Gt and I have never worked on one of these, so I need some help please. The car came in about two week ago with a check engine light (Code P0128 Engine Coolant Temperature Bel...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick LeSabre Custom 3.8L spedo VIN: IG4HP52KOV
Vehicle speed reading was 25 mph higher on spedo head,compared to reading on scanner coming out of computer. Removed spedo head and sent out for repair.Problem repaired in spedo head.
1999 Chevrolet C1500 Suburban 5.7L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 3GKEC16R6X
I have got 3 replies.Tom [...] said check the convertor back pressure. Joe cat and Jimbo said check the fuel pressure regulator again. thank you for the help.The fix was ECM.Because only bank 2 that was rich,no problem at all onbank 1.When I look at data on ... Trouble codes: P0154, P1153, P300B (cyl. misfire).
1995 GMC K2500 Sierra SL 5.7L tps sensor VIN: 1GTFK24K7S
Guess what, it was a broken speed sensor wire about 2 inches from where the plug goes into the tranny. Works perfect now, thanx for the help guys. Len.
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