Question about 1997 Chevrolet Tahoe

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97 Chev Tahoe will not start after rain

Most of the time, after a rainfall, my 1997 Tahoe will start. But once I get the truck up to around 55 it will start to shudder or hesitate. I will lay off the gas and it goes back to normal. I have learned to 'feel' it coming and I can adjust. But twice, after heavier rainfalls, my truck would not start. Once was earlier this spring after a cold rain and 30-40 degree air temp. I waited 3 days and the truck started. Then again today, when the daytime temps hit the 80's. It rained Sunday, this morning before going to work - no start. I went out tonight and the truck fired right up. Not smooth perfect starts, but it started. Is this some kind of sensor problem?

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A very old and persistent problem with GM vehicles, especially the 350 (5.7) V-8, is similar to what you're are describing, runs like **** when it rains. What was (is) usually the problem, is a small crack not usually visible to the human eye, in the distributor cap. It a cheap and easy fix, just replace it at the local auto store. The good 'ol boy fix was to remove the cap and spray with carb cleaner, etc, to remove the moisture and put it back in place, works if you're 16 years old, broke, and dad has carb cleaner....

Posted on Jun 28, 2009

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I fixed a very tricky problem like that once by finding a loose main harness ground which was bolted to the chasis.The moisture made the difference wether the ground made a circuit or not.It was a GM vehicle by the way and the ground was in the rear of the vehicle from the body harness.I would not be suprised if that particular ground problem affected the fuel pump.proper harness grounds are critical in todays vehicles

Posted on Jun 23, 2009

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