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P1633 Diagnostic Trouble Code Discussion for April 2010

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Trouble Ticket Help Requests for DTC P1633
Help Request Posted
2001 Chevrolet c7500 8.1L backfire VIN: 1GBM7H1E21
P1633: n/a. At a steady cruise 55 M.PH. decelerate and Kaboom, sometimes 2 or 3 times out of the exhaust , but not as loud as the first backfire, I would think the muffler should be gone as loud as it backfires. We normally don't work on these trucks , but since it had th...
April 14, 2010
2001 Chevrolet c7500 8.1L backfire VIN: 1GBM7H1E21
P1633: n/a. At a steady cruise 55 M.PH. decelerate and Kaboom, sometimes 2 or 3 times out of the exhaust , but not as loud as the first backfire, I would think the muffler should be gone as loud as it backfires. We normally don't work on these trucks , but since it had th...
April 15, 2010
2001 Chevrolet c7500 8.1L backfire VIN: 1GBM7H1E21
P1633: n/a. At a steady cruise 55 M.PH. decelerate and Kaboom, sometimes 2 or 3 times out of the exhaust , but not as loud as the first backfire, I would think the muffler should be gone as loud as it backfires. We normally don't work on these trucks , but since it had th...
April 14, 2010
2001 Chevrolet c7500 8.1L backfire VIN: 1GBM7H1E21
P1633: n/a. At a steady cruise 55 M.PH. decelerate and Kaboom, sometimes 2 or 3 times out of the exhaust , but not as loud as the first backfire, I would think the muffler should be gone as loud as it backfires. We normally don't work on these trucks , but since it had th...
April 15, 2010