How to Change the Battery on Gmc Cars

by Contributing WriterUpdated June 12, 2017

The Gmc car is equipped with a maintenance-free battery positioned beside the washer fluid reservoir in the front of the engine compartment. The maintenance-free battery should be replaced when it fails. Take the existing battery to an auto-parts retailer or purchase a replacement with the same identification number shown on the existing battery's label. Change the battery at home for a fraction of a service center's fee.

Under The Hood:

 How to Change the Battery on a 2008 GMC Acadia

Cycle through your radio presets and write them down to aid in reprogramming the radio. Turn all electrical accessories off, and ensure that all lights are off. Turn the ignition switch off and remove the key.

Find the battery cover below the floor mat that is just behind the front seat. Remove the battery cover fastener and lift the cover off the battery box.

Using a ratchet, extension and socket, loosen the battery negative cable terminal nut. Remove the terminal from the negative battery post. Locate the two electrical quick-connectors near the negative cable, and disconnect them. Route the negative cable away from the battery post.

Locate the quick-connector on the positive battery cable and disconnect it. Open the cap on the plastic positive battery cable terminal cover. Loosen the terminal nut and remove the terminal.

Find the battery vent hose and pull it out of the hole in the battery box. Remove the battery retainer hardware, using a ratchet, extension and socket. Lift the battery up and out of the box. Remove the vent tube from the old battery, and install it on the new one. If the new battery does not have an orifice for the vent tube, do not use it. Take the battery back and get the right one. The battery must be vented.

Clean the posts on the battery and the cable terminals, using the battery terminal and post cleaner. Lower the new battery into the box. Install the retainer hardware and torque the retainer bolt to 18 foot-pounds, using a torque wrench and socket. Install the vent hose in the hole.

Install the positive battery cable terminal on the battery post, then tighten the terminal nut to 80 inch-pounds, using a torque wrench, extension and socket. Snap the positive terminal cover cap into place. Connect the positive cable electrical quick-connector.

Connect the negative cable quick-connectors. Install the negative battery cable terminal on the negative battery post and torque the terminal nut to 80 inch-pounds. Install the battery box cover and fastener, then torque the fastener to 14 inch-pounds.

Reprogram your radio presets.

Items you will need

  • Socket set

  • Extension

  • Ratchet

  • Battery terminal and post cleaner

  • Torque wrench

 How to Replace the Battery in a GMC Envoy

Open the hood and ensure that all electrical devices are turned off, and that there are no doors open or lights on anywhere on the vehicle.

Find the battery on the driver side of the engine compartment. Using a ratchet and socket, loosen the terminal bolt on the negative cable and disconnect the cable from the battery terminal. Lay the negative cable aside where it can't touch the battery, then loosen the positive cable bolt and remove the cable.

Disconnect the corrugated battery air duct from the front of the battery box. Look on the rear side of the battery box, and if so equipped, remove the coolant heater cord retainer from the box.

Locate and remove the three battery brace fasteners, then remove the brace from the tray and lift the battery cover up and off the battery. Using a ratchet, extension and socket, remove the battery retainer hardware and lift the battery up and off the tray.

Clean the terminals on the battery cables and clean the posts on the new battery. Lower the fully charged new battery onto the battery tray. Install the battery retainer hardware and torque the nut to 11 foot-pounds using a torque wrench, extension and socket.

Place the cover over the battery and position the battery brace. Install and torque the brace fasteners to 89 inch-pounds, using a torque wrench. Install the battery air duct and, if applicable, the coolant heater cord retainer.

Install the positive cable and bolt on the positive battery terminal, and torque the bolt to 11 foot-pounds. Install the negative cable and bolt, then torque it the same.

Reprogram your radio presets. Start the engine and drive the vehicle so the onboard computer can relearn its adaptive strategies.

Items you will need

  • Ratchet

  • Socket set

  • Extension

  • Battery terminal and post cleaner

  • Torque wrench

 How to Replace the Battery on a 2003 GMC Yukon

Raise the hood of your Yukon. Remove the negative cable from the battery with a wrench. Lift the cap off the positive terminal and remove the cable with a wrench.

Remove the two bolts from the battery brace on the front of the battery mounting area with your wrench. Remove the brace. Loosen the bolts on the retaining strap over the battery with a wrench. Remove the strap.

Lift the battery out of the tray. Install the new battery in the same orientation in the battery tray. Replace the retaining strap and tighten the bolts on each end with a wrench. Install the front brace and secure the bolts with a wrench.

Replace the positive battery cable. Tighten the cable with a wrench and snap the cover back over the terminal. Replace the negative battery cable. Tighten the connection with a wrench. Close the hood.

Items you will need

  • Wrench set

 How to Replace the Battery in a Yukon Key FOB

Insert a dime or some other flat, thin object into the side of the Yukon key fob. Carefully twist the dime to pry apart the transmitter halves.

Lift out the battery, using your fingers and without touching the circuitry on the key fob (static electricity could ruin the transmitter).

Set the new battery down (CR2032 or equivalent battery) into the key fob so that the positive side of the battery faces downward.

Put the two key fob halves together again by snapping them into place.

Test the transmitter for correct operation.

Items you will need

  • Dime

  • Replacement battery

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