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GMC Terrain 12V Automotive Battery Replacement Guide
How to change a dead 12 volt car battery in the engine bay of a 1st generation 2010-2016 GMC Terrain with photos.

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2016 Terrain 12V Battery
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Black Plastic Cover
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Pry Up Center of Fastener

This automotive maintenance tutorial was specifically written to assist owners of the first generation (2010, 2011, 2012, 2013, 2014, 2015 & 2016) GMC Terrain in changing a dead 12 volt automotive battery in the engine bay.

Owners of other General Motors vehicles such as the Buick Verano, Regal, LaCrosse, Cascada, Encore, Enclave, Envision, GMC Canyon, Sierra 1500, Acadia, Yukon, Denali, Savana, Spark, Sonic, Cruze, Malibu, Impala, Volt, Camaro, Corvette, SS, Trax, Equinox, Traverse, Tahoe, Suburban, Colorado, Silverado and Express may also find these DIY instructions to be helpful.

The OEM 12V car battery is a Group Size H6 or 48.

A few compatible replacement batteries with their part numbers are as follows: Bosch S6585B S6, Bosch S5532B, EverStart MAXX-H6 (Walmart), EverStart AGM H6, AutoCraft 48H6 and NAPA Legend BAT 7548.

The tools needed to complete this procedure include a flathead screwdriver, a deep well 10mm socket with a 1/4" drive ratcheting wrench and a regular 10mm wrench.

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Pry Out Base of Fastener
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Pop Rivet Removed
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Pry Up Middle of Rivet
To access the OEM 12 volt car battery, you'll need to remove a three fasteners to release the black plastic flap at the front corner of the engine bay.

Pry out the smaller round button part of the three fasteners with a flathead screwdriver to unlock them.

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Pull Out Base of Pop Rivet
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Plastic Fastener Removed
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3 Pop Rivets Removed
Then pry out the base of each fastener to remove them.

Set the three pop rivet fasteners aside in a safe place.

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Lift Up Plastic Cover
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Fold Back Access Panel
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OEM 12V Battery
Lift up the plastic cover from the top of the headlight housing and flip it back towards the rear of the engine bay.

(Tip - This is also an easy way to access the front turn signal light bulb socket.)

The SUV's ECU or "electronic control unit" (computer) is located on top of the 12V battery.

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10mm ECU Computer Bolt
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Remove 10mm Bolt
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10mm Bolt Removed
The ECU computer is held in place to the battery hold down bar by a single bolt on the left side near the wire harnesses.

Remove the bolt by turning it counterclockwise with a 10mm socket and a 1/4" drive ratcheting wrench.

You might find it easier to remove the bolt by using an extension bar on the wrench.

Set the 10mm bolt aside in a safe place.

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Slide ECU To Right
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Computer Released From Hooks
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Lift Off ECU Computer
Push the ECU computer towards the right side of the engine bay to release the two hooks on the hold down bar from the two slots on the underside of the ECU housing.

Once the computer is free from the battery hold down bar, lift it off and gently rest it on the engine cover.

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12V Battery Exposed
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Battery Hold Down Bar
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10mm Bolt Removed
Remove the bolt at the front of the battery hold down bar by turning it counterclockwise with a 10mm socket and a 1/4" drive ratcheting wrench.
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Loosen Rear 10mm Nut
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Deep Well 10mm Socket
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10mm Nut Removed
Remove the 10mm nut on the rear edge of the battery clamp bar by turning it counterclockwise with a deep well 10mm socket or a 10mm wrench.

Set the 10mm bolt and nut aside in a safe place.

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Lift Off Battery Clamp
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Battery Clamp Removed
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Black Rubber Cover "-"
Lift the battery hold down bar off the old battery and set it aside in a safe place.

Pull the black rubber cover off the negative terminal.

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Loosen 10mm Terminal Nut
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Pull Off Negative Terminal
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Tuck Away "-" Terminal
Loosen the nut on the negative terminal by turning it counterclockwise with a 10mm socket and a ratcheting wrench.

Pull the negative terminal off the "-" battery post, wrap it in a small towel and tuck it away behind the battery to help prevent accidental electrical contact.



 

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Red Rubber Cover
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Loosen Counterclockwise
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Socket Won't Fit
Lift the red rubber cover off the positive terminal.

Loosen the 10mm nut on the positive terminal by turning it counterclockwise a few turns with a 10mm wrench.

My 10mm socket and ratcheting wrench wasn't able to fit over the terminal nut with that black metal bracket in the way.

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Pull Off Positive Terminal
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OEM 12V Battery Removed
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ACDelco 4180 Battery
Pull the positive terminal off the "+" battery post and tuck it away on the left side of the battery.

Carefully lift the old battery out of the engine bay and rest it on the ground.

Try to avoid dropping or tipping over the old battery to prevent from having battery acid leak out.

Be sure to take the old battery with you to Walmart or the auto parts store to avoid having to pay a "core" or "recycling" charge. The retailer will have the old battery properly recycled.

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Clean Off Battery Tray
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Lower In New Battery
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Push On Positive Terminal
Clean off any debris from the plastic battery so that the new battery will rest evenly on it.

Lower the new 12V battery in to the engine bay with the positive "+" post on the left (passenger) side and the negative "-" post on the right (driver) side.

If you've had a problem with corrosion build up on the battery terminals, install some felt anti-corrosion washers on to the battery posts.

Push the positive terminal on to the "+" battery post.

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Tighten 10mm Clockwise
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Replace Rubber Cover
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Replace Negative Terminal
Tighten the positive terminal nut in the clockwise direction with the 10mm wrench.

Close the red rubber cover over the positive terminal.

Push the negative terminal on to the "-" battery post.

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Tighten 10mm Nut
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Replace Black Rubber Cover
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Lower Battery Clamp Bar
Tighten the 10mm negative terminal nut in the clockwise direction until it is snug.

Try to avoid over tightening the terminal nut to prevent from cracking or damaging the battery post which may lead to an acid leak.

Lower the hold down bar or "clamp" over the new battery.

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Spin On 10mm Nut
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Replace 10mm Bolt
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Deep Well 10mm Socket
Spin the 10mm nut on to the rear edge of the hold down clamp.

Replace the 10mm bolt in to the front of the hold down bar.

Tighten the 10mm nut and bolt in the clockwise direction until they are snug.

Try to move the new battery around on the tray. If it can be moved, wiggled or rocked, tighten the 10mm nut and bolt another turn or two.

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Tighten 10mm Clockwise
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Two Metal Tabs On Bar
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2 Slots - Bottom Computer
Locate the two black metal tabs on the battery hold down bar and the two slots on the underside of the ECU computer housing.
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Slide Computer To Left
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Spin In 10mm ECU Bolt
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Tighten 10mm Clockwise
Slide the ECU housing towards the left (passenger side) to secure the two metal tabs in to the slots.

Re-insert the 10mm bolt and tighten it in the clockwise direction to secure the ECU housing.

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Lower Plastic Cover
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Plastic Panel Replaced
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Re-Insert Pop Rivet
Lower the plastic cover over the 12V battery and the headlight housing.

Make sure that the center pieces of the fasteners are raised up.

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Push Down Center of Fastener
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Replace All 3 Fasteners
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12V Battery Replaced
Re-insert the 3 plastic fasteners and push down the center part to secure them in place.

Test the new 12V battery by starting the engine and turning on the headlights.

Please remember to adjust the time on the clock and program your favorite radio station presets before driving.

For more, check out my other 2010-2016 GMC Terrain DIY Repair & Maintenance Guides.
 

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