The GMC Sierra has an alternator that sends electrical ongoing to divers devices in the vehicle while the engine is running.4. Install the new alternator assembly by reversing the removal procedure. Tighten the bolt on the bracket (if present) and the right mounting bolt to 18 foot pounds with a torque wrench.
Decide which alternator your GMC Sierra Testament duty. You'll yearning to be trustworthy the latest alternator is compatible with your Sierra's engine. Models are equipped with a Vortec 4.3 L, 4.8 L, 5.3 L or 6.0 L engine, depending on the exact example.
2. Disconnect the refusal battery cable and remove the embellishment girdle(s) with a socket wrench. Use a socket wrench to remove the nut on the alternator that attaches the battery feed wire to the alternator and remove the feed wire.
3. Remove the mounting bolts from the alternator with a socket wrench. You may also need to remove a mounting bracket with a socket wrench on some models. This will allow you to remove the alternator assembly.
Most alternators unreal nowadays allow for a voltage regulator that ensures the voltage common remains fixed. You may compulsion to change the alternator provided your battery keeps running down or your headlights eventually be dimmer while driving.
Instructions
1. Torque the left mounting bolt to 37 foot pounds and attach the battery feed wire to the stud on the alternator. Torque the nut for the battery feed wire to 71 inch pounds.5. Install the accessory belt(s) and connect the negative battery cable with a socket wrench.
