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1999 GMC Sierra 1500 SLT 5.3L Heater Core
thanks for checking in! this truck exibits a loud humming or buzzing sound from the heater core on high rpm or hard pull while pulling camp trailer. the customer and i decided to bypass heater core and noise went away. he produced an invoice which stated a pre...
FIX posted 2/8/2003
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Related Documents & Media | VIN | 2GTEC19T4X |
| Engine | 5.3 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Affected | Heater Core |
| Conditions | Noise |
| Misc. | 2WD |
Message Closed w/Summary
Vehicle Data
1999 GMC Sierra 1500 SLT
| VIN | 2GTEC19T4X |
| Engine | 5.3 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Affected | Heater Core |
| Conditions | Noise |
| Misc. | 2WD |
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