I have had a very intermittent starting problem with my Jimmy for a couple of years which has recently become more frequent. It doesn't matter if the truck is hot or cold. There doesn't seem to be anything common except that it just suddenly decides to start up just before the battery goes completely dead from cranking. It was suggested that it could be the fuel pump relay which I swapped with the AC relay during the last occurence but it had no effect. A few tries later, it just started again.
Then the next day, a short local trip, a five minute shutdown and it happened again. Just a note: it seems to catch for a second and the tach goes to about 1000rpm's and just shuts down as if I had just shut off the key. Any troubleshooting advice would be appreciated.
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Sunday, September 28th, 2008 AT 11:53 AM