
2001 Chevrolet c7500 8.1L Backfire
At a steady cruise 55 [...]. 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 t...
Summary posted 5/17/2010
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Message Closed w/Summary
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VIN | 1GBM7H1E21 |
Engine | 8.1 L / 8 cyl |
Delivery | Fuel Injection / sefi |
Emissions | OBD-II Compliant |
Symptoms | Backfire |
Occurs | On Decel, Cruise |
Misc. | West Texas Gas Hauler |
Trouble Codes
P0522 | Oil Pressure Voltage Too Low |
P1633 | TCM Internal - Test External Watchdog Performance |
Message Closed w/Summary
Vehicle Data
2001 Chevrolet c7500
VIN | 1GBM7H1E21 |
Engine | 8.1 L / 8 cyl |
Delivery | Fuel Injection / sefi |
Emissions | OBD-II Compliant |
Symptoms | Backfire |
Occurs | On Decel, Cruise |
Misc. | West Texas Gas Hauler |
Trouble Codes
P0522 | Oil Pressure Voltage Too Low |
P1633 | TCM Internal - Test External Watchdog Performance |