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1991 Chevrolet C1500 Cheyenne 5.0L Heat & A/C Controls
customer was back to day, when climate control is selected for recirculation there is a repeated dull rapping noise coming from the area of the heater box. this only occurs on the recirculation cycle and no other cycles. thanks bob nash
FIX posted 2/16/2000
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Message Closed w/FIX
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Related Documents & Media 
| VIN | 1GCDC14H3M |
| Engine | 5.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI |
| Affected | Heat & A/C Controls |
| Conditions | Recirculation Operation |
Message Closed w/FIX
Vehicle Data
1991 Chevrolet C1500 Cheyenne
| VIN | 1GCDC14H3M |
| Engine | 5.0 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI |
| Affected | Heat & A/C Controls |
| Conditions | Recirculation Operation |
Video