How to replace the alternator bracket on a 4.3L engine on 2007 GMC Sierra 1500?

Replacement One should remove the generator, drive belt tensioner, and idler pulley to replace the generator bracket on a 4.3L engine. Removal of the bracket, nut and bracket bolts. Install the new bracket, fixing it using bolts and nut. Lastly, replace idler pulley, tensioner and generator.

OEM 2007 GMC Sierra 1500 Alternator Bracket

Alternator Mount

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2 Alternator Brackets found

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2007 GMC Sierra 1500 Mount Bracket Part Number: 12554030
$96.56 MSRP: $163.23
You Save: $66.67 (41%)
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Product Specifications
- Other Name: Bracket, Generator Mounting; Alternator Bracket; Bracket; Bracket, Power Brake Booster
- Item Weight: 7.70 Pounds
- Item Dimensions: 5.8 x 19.3 x 13.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12554030
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2007 GMC Sierra 1500 Submodels:
- Base, C3, Denali, HT, Hybrid, SL, SLE, SLT, WT, XFE | 6 Cyl 4.3 L GAS, 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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2007 GMC Sierra 1500 Idler Pulley Part Number: 10236997
$91.02 MSRP: $153.85
You Save: $62.83 (41%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Bracket, Engine Cooling; Alternator Bracket; Mount Bracket; Tensioner Bracket; Accessory Bracket; Generator Mounting Support.
- Item Weight: 6.60 Pounds
- Item Dimensions: 13.1 x 8.2 x 8.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 10236997
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2007 GMC Sierra 1500 Submodels:
- Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS

2007 GMC Sierra 1500 Alternator Bracket

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2007 GMC Sierra 1500 Alternator Bracket Parts and Q&A

Q: How to replace the alternator bracket on a 4.3L engine on 2007 GMC Sierra 1500?
A: Replacement One should remove the generator, drive belt tensioner, and idler pulley to replace the generator bracket on a 4.3L engine. Removal of the bracket, nut and bracket bolts. Install the new bracket, fixing it using bolts and nut. Lastly, replace idler pulley, tensioner and generator.