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2000 Chevrolet Silverado 1500 5.3L Poor Idle Quality, MIL Lamp on
I have smoke tested this engine and cleaned throttle body. I can remove intake and feel the iac is shutting but idle still high. The ecm starts at 180 for counts then goes to zero. I have new egr and intake gaskets. The purge and egr are good. I observed t...
FIX posted 1/22/2026
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Related Documents & Media | VIN | 2GCEC19T8Y |
| Engine | 5.3 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0507 | Idle Speed Control System Higher Than Expected |
Message Closed w/FIX
Vehicle Data
2000 Chevrolet Silverado 1500
| VIN | 2GCEC19T8Y |
| Engine | 5.3 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | Fuel Injection / SEFI |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, MIL Lamp On |
| Occurs | Always |
Trouble Codes
| P0507 | Idle Speed Control System Higher Than Expected |
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