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1989 GMC R3500 7.4L ac
I retrofitted this system in 87. did not cool very good even with R12 & about the same with 134a. I have installed the new type [VVOT] orifice tube & adj cycle switch to cycle at [...] clutch air gap because of intermitten operation,clutch works ok now. coolin...
FIX posted 9/15/2000
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Message Closed
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| VIN | 1GTHR33N8K |
| Engine | 7.4 L / 8 cyl |
| Affected | A/C |
| Conditions | Little Cooling |
| Misc. | Old Body Style |
Message Closed
Vehicle Data
1989 GMC R3500
| VIN | 1GTHR33N8K |
| Engine | 7.4 L / 8 cyl |
| Affected | A/C |
| Conditions | Little Cooling |
| Misc. | Old Body Style |
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