One way. They make a small power supply that has a 9 volt battery that you plug into your lighter socket. It's avaible at most parts store.
Disconnect the negative battery cable from the battery.
Disconnect the negative battery terminal for about 10 minuets.
Disconnect the negative battery cable from the battery, remove the two bolts from the starter, drop the starter enough to disconnect the wires from it and remove the starter from the engine.
disconnect battery
disconnect the 91 blazer cables at the battery. One at a time, disconnect the cable at the opposite end, then pull it out. Put the new cable in, routing it the same way, then connect the non battery end. do the same for the other cable, then connect the cables to the battery.
There is no reset for the computer. You can disconnect the negative battery cable for 5 minutes and this may or may not reset any fault codes. If not they will have to be reset with an OBD2 scan tool.
Disconnect the battery cable. Remove the bolts that hold the starter in place. Disconnect the wires. Instahlation is in reverse.
First, disconnect the negative cable on the battery. Remove bolts support the starter. Lower and tilt starter to give you access to the wires. Detach the wires. Install starter in the opposite method of removing.
5/16" or 8mm
Disconnect the - battery terminal Raise and support vehicle Disconnect the wiring harness at top of starter Remove mounting bolts Drop starter
Drop the dust cover. Drop the drive line take bolts out and there ya have it! It is difficult to remove the starter on a Blazer. Disconnect battery (negative), disconnect 2 wires on starter, remove 2 bolts - it drops down but you must still remove a cross member to remove it from the car
disconnect your neg batt cable