The B&M ShiftPlus Electronic Shift Improver
submitted by Jason
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The B&M ShiftPlus Electronic Shift Improver (P/N 70380) is designed to enhance the performance of your automatic transmission. Your truck will shift faster and firmer with the unit installed. There are 3 settings on the control unit; off, 1 and 2. Off is off and will shift like stock, 1 and 2 are more aggressive. 1 is good for around town, while 2 is pretty harsh. The instructions state it is designed for all GM vehicles 1993 thru 1998 w a 4L60E or 4L80E tranny. I have a 2002 S-10 CC w/ the 4L60E and it works fine. The hardest part will be finding the correct wires.

1. Disconnect the negative battery cable


2. Remove the connector pack from the PCM (Powertrain Control Module). On my ’02 there are 2 connector packs, the wires you need are in the lower connector pack. The PCM should be located above the front passenger side wheel well.


3. Determine where you will mount the switch, preferable inside the cab. I mounted mine above the center console near the heater duct. I drilled a 3/16 hole thru the firewall to run the wire to the PCM.

4. At the PCM locate the Red wire w/ Black Stripe and crimp on the Red wire from the Shift Plus. Now locate the Light Blue wire w/ White Stripe and crimp on the Black wire from the Shift Plus. (connectors are included) Wrap connections with black electrical tape and reinstall connector pack. Use zip ties to secure the wire thru the engine compartment. Reconnect the negative battery cable and drop the hammer.

*Note - You will have to shut the engine off before making changes to the switch position on 1998 and newer vehicles