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1991 GMC K2500 Sierra SLE 5.7L Heater
you can put the fan on hi speed it will work for a while but it will gradually spot blowing air out of the vents the fan is still on hi speed thanks greg
FIX posted 6/30/1999
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Message Closed
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Related Documents & Media 
| VIN | 1GTGK24K3M |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI |
| Affected | Heater |
| Conditions | No Air Out of Vents |
Message Closed
Vehicle Data
1991 GMC K2500 Sierra SLE
| VIN | 1GTGK24K3M |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed Automatic |
| Delivery | FI |
| Affected | Heater |
| Conditions | No Air Out of Vents |
Video