1988 Chevrolet G30 Hi-Cube 5.7L No down shift
This is an Army truck and yes the milage is correct. There is no down shift. The theroy I read stated when you floor the gas the MAP voltage goes high and then the PCM grounds the down shift relay and puts 12volts to the solenoid. The data stream shows the MAP...
FIX posted 4/11/2006
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Message Closed w/FIX
Vehicle Data1988 Chevrolet G30 Hi-Cube
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Message Closed w/FIX
Vehicle Data
1988 Chevrolet G30 Hi-Cube
VIN | 2GBHG31K0J |
Engine | 5.7 L / 8 cyl / GAS |
Trans | 3-speed Automatic |
Delivery | FI |
Affected | No Down Shift |