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1991 GMC G30 Box Van 7.4L No Scan Tool Comm
vehicle will not blink code 12 or communicate.. there is no wire in the aldl pin e serial data wire.. and does not appear to have ever been there.. also i should get 5volt ref on pin b in aldl and do not. pin b in aldl is pcm pin a9 which also is not in pcm co...
FIX posted 8/27/1998
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Message Closed w/FIX
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| VIN | 2GDJG31N3M |
| Engine | 7.4 L / 8 cyl |
| Symptoms | No Scan Tool Comm |
| Misc. | G30 Crew Cab Dually |
Message Closed w/FIX
Vehicle Data
1991 GMC G30 Box Van
| VIN | 2GDJG31N3M |
| Engine | 7.4 L / 8 cyl |
| Symptoms | No Scan Tool Comm |
| Misc. | G30 Crew Cab Dually |