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1997 GMC K2500 Suburban 7.4L noise
have a noise from a check valve in air injection system it busses after start up cold or hot have tryed replacing valve but it still busses air pump is controled by computer it has a magnetic clutch on it comp turns it on and off system seam to be working righ...
FIX posted 1/6/1999
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| VIN | 1GKGK26J6V |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / efi |
| Emissions | OBD-II Compliant |
| Symptoms | Noise |
| Occurs | Cold, Hot, After a Hot Soak |
| Misc. | Calif |
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Vehicle Data
1997 GMC K2500 Suburban
| VIN | 1GKGK26J6V |
| Engine | 7.4 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / efi |
| Emissions | OBD-II Compliant |
| Symptoms | Noise |
| Occurs | Cold, Hot, After a Hot Soak |
| Misc. | Calif |
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