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1999 Chevrolet Silverado 2500 6.0L Hesitation, Back fire
Hesitates only for about the first 4 or 5 accelerations after start up. Back fires through intake manifold. On wide open throttle O2 goes lean. Bank 1 cat is partially plugged on back pressure test it is at 3 psi at 2500 rpm and Bank 2 is at 1 1/4 psi at 2500 ...
Summary posted 8/5/2005
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Related Documents & Media | VIN | 1GCGK29U0X |
| Engine | 6.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Hesitation, Back Fire |
| Occurs | Cold, on Accel |
| Misc. | Ls 4X4 |
Trouble Codes
| P0137 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage |
| P0157 | Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage |
Message Closed w/Summary
Vehicle Data
1999 Chevrolet Silverado 2500
| VIN | 1GCGK29U0X |
| Engine | 6.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Hesitation, Back Fire |
| Occurs | Cold, on Accel |
| Misc. | Ls 4X4 |
Trouble Codes
| P0137 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage |
| P0157 | Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage |
Video