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1999 - 2006 (GMT800) Section for all discussion related to the 1999-2006 Chevrolet and GMC trucks.

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Old September 7th, 2019, 8:40 PM
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I have an 02 GMC Sierra 2 wheel drive 5.3 with 325,000 miles that I bought new, yesterday it would not start , battery bad . Jumped started and let truck run for about a half hour , when i pulled off to go get battery truck smoked blue smoke for a couple blocks then quit smoking completely. Doen't smoke when starting . This is the second time i have had this problem with the smoking . Any ideas ?
Old September 8th, 2019, 12:48 AM
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Originally Posted by Emsy
I have an 02 GMC Sierra 2 wheel drive 5.3 with 325,000 miles that I bought new, yesterday it would not start , battery bad . Jumped started and let truck run for about a half hour , when i pulled off to go get battery truck smoked blue smoke for a couple blocks then quit smoking completely. Doen't smoke when starting . This is the second time i have had this problem with the smoking . Any ideas ?
Motor oil is getting into the combustion chambers. Could be worn valve/guides or hardened up valve seals.Which is normal at 325K.
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