How to replace the starter motor (LAF) on GMC Terrain?

To replace the Starter motor (LAF) one will first remove the negative Battery Cable. Second, eliminate the positive air pump vacuum brake booster (2.4L & 3.0L engines). Lift the vehicle, remove the engines harness connector sticking out from the Starter. Depress when removing the Starter when removing the Starter solenoid terminal nut and the Starter solenoid wire terminal from the Starter plus the positive Battery Cable terminal (DeCristofaro, 2016). Drain the bolts that are attached to the Starter and remove the Starter. For installation, place the Starter to the engine while maintaining precautions on the fasteners. Put in the Starter bolts, tighten them thereby 40 nm (30 lb ft). Reconnect the Starter solenoid wire terminal and the positive Battery Cable terminal with the anti-rotational tab in the correct indexing slot. Mount and tighten the Starter solenoid terminal nut to 17 nm (13 lb.ft.), and attach the engine harness connector to the Starter. Replace the power vacuum brake booster pump for both types of engines, lower the vehicle and the last one is connecting the negative Battery Cable.

OEM GMC Terrain Starter

Starter Ignition

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5 Starters found

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GMC Terrain Starter Part Number: 12645298
$213.93 MSRP: $401.72
You Save: $187.79 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Starter, Starter Motor; Starter Motor
- Replaces: 12598756, 12601721
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2017 GMC Terrain | Denali, SLE, SLT | 6 Cyl 3.0 L FLEX, 6 Cyl 3.0 L GAS, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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GMC Terrain Starter Part Number: 55491790
$160.29 MSRP: $299.10
You Save: $138.81 (47%)
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Product Specifications
- Other Name: Starter, Starter Motor
- Replaced by: 55503480
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2019 GMC Terrain | SLE, SLT | 4 Cyl 1.6 L DIESEL
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GMC Terrain Starter Part Number: 12663052
$255.29 MSRP: $491.97
You Save: $236.68 (49%)
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Product Specifications
- Other Name: Starter, Starter Motor; Starter Motor
- Replaces: 12658432
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2020 GMC Terrain | Denali, SLE, SLT | 4 Cyl 2.0 L GAS
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GMC Terrain Starter Part Number: 12707576
$225.86 MSRP: $448.32
You Save: $222.46 (50%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Starter Assembly-.; Starter, Starter Motor
- Replaced by: 25207544
- Replaces: 12680615, 12690481, 12673600
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2024 GMC Terrain | AT4, Denali, SL, SLE, SLT | 4 Cyl 1.5 L GAS
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GMC Terrain Starter Part Number: 12609317
$218.17 MSRP: $433.03
You Save: $214.86 (50%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Starter, Starter Motor
- Replaces: 89060407
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2010-2017 GMC Terrain | Denali, SL, SLE, SLT | 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS

GMC Terrain Starter

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The starter is one of the most important parts within the GMC Terrain system since it is utilized in order to start the functioning of the engine by converting electrical energy originating from the battery into mechanical energy. This starts when the ignition key is turned and energizes the starter's solenoid which is wired to the battery via big size wire. In its turn, solenoid gets the starter motor running that starts to engage the starter drive gear with the flywheel or flexplate ring gear in order to crank the engine. The starter includes an armature, field coils or permanent magnets, and a gear system that augments the torque supplied to an engine flywheel as the starting process is under way. Through the past years, the starter of the GMC Terrain starter predominantly followed an electric starter model, which has usually safety measures of the neutral switch safety in case of an automatic transmission and clutch switch for safety in cases of the manual transmission to avoid the starting the engine while the gear is engaged. First OE starters are rather sturdy, providing much torque, but they may fail when working on high-compression engines installed in modified GMC Terrains, and, thus, require high-performance starters. All in all, it is clear that the GMC Terrain's starter is crucial for its functioning with the help of the electrical and mechanical connections for proper work of the engine. Most replacement starters are identical to the original equipment starters used in GMC Terrain vehicles, however, higher output or otherwise modified starters might be necessary for Terrain vehicles with modified or high-compression engines to prevent problems such as starter or kickback failure.

GMC Terrain Starter Parts Questions & Experts Answers

Starter
12645298
Q: How to replace the starter motor (LAF) on GMC Terrain?
A:
To replace the Starter motor (LAF) one will first remove the negative Battery Cable. Second, eliminate the positive air pump vacuum brake booster (2.4L & 3.0L engines). Lift the vehicle, remove the engines harness connector sticking out from the Starter. Depress when removing the Starter when removing the Starter solenoid terminal nut and the Starter solenoid wire terminal from the Starter plus the positive Battery Cable terminal (DeCristofaro, 2016). Drain the bolts that are attached to the Starter and remove the Starter. For installation, place the Starter to the engine while maintaining precautions on the fasteners. Put in the Starter bolts, tighten them thereby 40 nm (30 lb ft). Reconnect the Starter solenoid wire terminal and the positive Battery Cable terminal with the anti-rotational tab in the correct indexing slot. Mount and tighten the Starter solenoid terminal nut to 17 nm (13 lb.ft.), and attach the engine harness connector to the Starter. Replace the power vacuum brake booster pump for both types of engines, lower the vehicle and the last one is connecting the negative Battery Cable.