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Prev Professional Automotive Repair Technical Discussions for April 23, 2010
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Open Help Requests for GM
Help Request Answers
1996 Buick Skylark Custom 2.4L Timing Shain VIN: IG4NJ52T6T
Vehicle brought in for timing chain components diaged at other shop for rattling noise. My writer asked if they would like me to give anothe opinion and they said just do the job they had asked for. And i did, and the noise is still there to some extent. Custo...
1993 Cadillac Seville 4.9L Poor Idle Quality, Hesitation, Surge, Stall VIN: 1G6KS52B5P
Problem occurs intermittently at idle and under a load. It would run perfect with no problem plenty of power then all of a sudden no power and a minute later power comes back. When it runs bad at idle it straightens up after 5 minutes. I've checked and cleaned...
2003 Cadillac CTS 3.2L MIL Lamp on, limp mode VIN: 1G6DM57N83
This one happens only once a month but when it does it will only idle until he restarts the car then it just shifts bad until i clear the codes. I have never been able to get the car to act up. But when i was checking it out i once had 28ohms on the low Trouble codes: P0221 (Tp s 12 mismatch), P2176 (Min tp not detected), P2135 (Tps 1 2 voltaged more than predicted)
1995 Chevrolet Blazer 4.3L Hesitation, Surge, Stall VIN: 1GNDT13W8S
hello everyone vehicle was towed to our shop not starting/running.rolled inside and it started. oboy. because of leakdown and low fuel pressure we replaced pump and filter. runs but when holding rpms about 1300-1600 it surges all the iatn messages a...
1996 Chevrolet Camaro Z28 5.7L No Start VIN: 2G1FP22P1T
HELP!!! We have this optisppark system killling us and need some help. The history is we got a call from customer to diag no start. He stated that he had just installed the second dist assembly and could not figure out why it would start and die. We diagnosed ...
1999 Chevrolet Express 1500 5.7L differential VIN: 1GBFG1SR1X
This vehicle is actual at a local dealer who were on good terms with. The vehicle was taken in on trade and sold before it got inspected. It had a problem with trans slipping and howling noise from rear under load at 50-55mph goes away above 55 and isnt there ...
2000 Chevrolet Blazer LS 4.3L Runs "rough" VIN: 1GNDT13W4Y
Vehicle came into our shop with a CEL. Retrieved codes with Snap-On Solus Scan Tool. DTC P0410 - SEC AIR INJ SYS MALFUNCTION. Determined AIR Pump Motor Had siezed do to water getting in the inlet hose/tube. Replaced AIR Injection Pump Motor and Inlet Tube/Hose... Trouble codes: P0410 (Sec air injection system malfunction)
2001 Chevrolet Malibu 3.1L Water pump VIN: 1G1NE52J31
Hello Everyone. I have a noise from the water pump area on this car. I replaced the engine with a used 3.1 because of high milage and engine knock. The used engine had roughly 39 k. easy switch, did not replace water pump. Note the used engine came from a 2002...
2002 Chevrolet Trailblazer LT 4.2L window/doorlocks VIN: 1GNDT13S12
Came in no passenger door locks,no power window, and no mirror. Checked all powers and grounds and replaced passenger door module. Sent to dealer to have flashed, now the door locks work intermitantly and the window goes down fine but on the way up it stops ev...
2007 Chevrolet Silverado 1500 WT 4.8L No Start VIN: GCEC14C77Z
Truck towed in no start. No crank. Found Dlis 2a fuse blown. Sirius power adapter spliced in to pink wire (pin 2)of ign switch. Wire touched ground blew fuse. Codes gone, ign power restored. Still no crank. Service theft system lights up in display. Cust does ... Trouble codes: B1370 (Device Ign 1 circuit), B1380 (Device Acc 1 circuit)
2002 Saturn SL2 1.9L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1G8ZK54722
Hey guys in need of a little insight in the saturn department.i got this one from the dealer who quoted customer for catalyst and o2 sensor for a missfire condition. Engine missfires only under extended heavy load ( long long hill ). Tech 2 registers missfires...
2003 Saturn Vue 2.2L Hesitation VIN: 5GZCZ43D03
Runds very good at idle. Very poor acceleration. Feels like exhaust cloged or taking off in high gear

Fixes & Summaries for GM
Fix/Summary Answers
1996 Chevrolet Cavalier 2.2L Extended crank time, VIN: 1G1JC1244T
After much head scratching and frustration, the problem remained. I tried the things suggested, but did not get to the root cause. In the end, I checked the injector resistance, and found three out of the four injectors at about 24 ohms, and the remaining one ...
2001 Chevrolet Express 2500 5.7L HVAC control VIN: 1GCHG35R71
We are in the process of fixing this vehicle. All controls heads were new OEM (2 that we tried). It appears the defrost actuator is not sealed and creating a leak. Currently dash board is being removed for repair. Looks to be better part of today's fun. thanks...
2002 Chevrolet Tahoe LT 5.3L MIL Lamp on VIN: 1GNEK13Z52
Thanks for the fast responces. found chafed wire near b1s2 wiring harness that did in fact blow the fuse under hood. repaired wire, test drove, no failure records now. thanks again Trouble codes: P141, P161.
2002 Chevrolet Suburban 1500 LT 5.3L Misfire VIN: 3GNFK16TX2
Customer has decided to wait to further diag / repair of this vehicle. Agree with other and what dealer says. Cam lobes most likely flattened. Trouble codes: P0300, P0305.
2003 Chevrolet Avalanche 1500 5.3L 3-4 shift VIN: 3GNEC13T13
Thank you very much guys. I got the 2003 chevy abalanche back on the road. All of you fellows that mentioned O/H the trany were on target. i received 19 responsed all says to get trany O/H. the problem was 3-4 shift slip with no code. I droped the pan and f...
1996 GMC Jimmy SLE 4.3L start VIN: 1GKDTY13W8
Had 2 issues. Bench test of alternator was negative at first, but finally got it hot enought to fail. faulty rectifier. ALso had problem with battery cables. they looked visibly ok but a volt drop test showed high resistance especially on the ground side. rep...
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