Question about 1997 Chevrolet Blazer

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Can't get alternator out of 98 Blazer LS

I've got a 98 blazer. Have removed all visible nuts/bolts and removed serpentine belt but alternator wont come out. Am I missing something?

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There are 2 bolts on the front bottom one on the back upper corner. Once removed you 2 pry bars one on ech side and it should come right out they fit tight in the bracket

Posted on Mar 08, 2009

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1 Answer

How to replace water pump on 4.2 liter 2004 trail blazer LS

4 bolts hold the shroud on. 2 on bottom,2 on top. Leave on in on the top until you remove the clutch fan. Clutch fans are a pain to get off with out the right tools. Once off, remove the bolt from the shroud and pull them out together. Remove the serpentine belt. Remove the pump.

Dec 16, 2015 | 2004 Chevrolet TrailBlazer

1 Answer

How do you remove the serpentine belt on a 1997 chevy blazer to install a new water pump?

As your standing in front of the car looking at the engine the serpentine belt tensioner is furthest to the left and in between the crank pulley and the alternator. You can use a 15mm wrench on the bolt head in the center of the tensioner pulley to rotate the tensioner counter clockwise.

I usually just use my left hand to push the tensioner in and remove/install the belt with my right hand.

Oct 13, 2010 | Chevrolet Blazer Cars & Trucks

2 Answers


  1. Disconnect negative battery cable, then disconnect the positive cable from the battery.
  2. Disconnect and tag all wiring to the alternator. Fig. 1: Some of the alternator wiring is at a ring terminal located under a protective rubber boot on the rear of the alternator 85773154.jpg
    Fig. 2: A small box or open-end wrench may be used to loosen the wiring retaining nut 85773155.jpg
    Fig. 3: Squeeze the locktab and disengage the connector from the side of the alternator housing 85773156.jpg

  3. If necessary for removal clearance, disconnect the ground strap from the alternator bracket.
  4. If equipped, remove the alternator brace bolt.
  5. If the truck is equipped with power steering, it may be necessary to loosen the pump brace and mount nuts.
  6. Remove the lower mounting bolt, then support the alternator and remove the upper mounting/adjusting bolt.
  7. Slip the alternator belt from the pulley and remove the alternator from the truck. Fig. 4: Loosen the lower mounting bolt 85773159.jpg
    Fig. 5: The alternator uses a very long lower mounting bolt which passes through the alternator housing and a bushing before threading into the engine block 85773160.jpg
    Fig. 6: Support the alternator by hand and unthread the upper mounting/adjustment bolt 85773161.jpg

  8. Installation is the reverse of removal. Be sure that the bushing is in place when the lower mounting bolt is installed. Should the bolt be torqued without the bushing in position, alternator housing damage would likely occur.
  9. Adjust the belt(s) to have 1?4 - 1?2 inch depression under thumb pressure on its longest run. Fig. 7: Once the alternator is free, it may be lowered slightly so the belt may be removed from its pulley 85773162.jpg
    Fig. 8: Remove the alternator housing from the vehicle by lifting upward 85773163.jpg
    Fig. 9: During installation, carefully pry outward on the alternator in order to adjust the belt tension 85773164.jpg
    Fig. 10: Alternator mounting, in-line 6 and gasoline V8 engines 85773007.gif
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Sep 24, 2010 | 1987 Chevrolet Blazer

1 Answer

How to remove and replace a generator on 2000 Chevy blazer

First of all, there is no generator any more. I have a 50 Chevy with a generator. Generator is what was used to recharge batteries. Now they have alternators. First you take off your serpentine belt. The alternator should either have a plug in the back or a bolt sticking out with a wire leading to it. Unplug all of that. There shoud be two bolts on both sides you will have to remove. Then put the new one on and reverse the process.

Jul 02, 2010 | 2000 Chevrolet Blazer

1 Answer

Replacing the alternator

Fig. : Alternator mounting-2.2L engine



(2.2L Engine)
  1. Disconnect the negative battery cable.
  2. Raise and support the front of the vehicle, then remove the passenger side tire and wheel assembly for access to the rear of the alternator through the wheel well.
  3. Working through the wheel well, unfasten the alternator brace-to-block bolt, then remove the brace-to-intake nut and the brace-to-engine stud nut.
  4. Unplug the alternator wiring connector, then remove the battery terminal nut and wire.
  5. Carefully release the serpentine belt tension and remove the belt from the alternator pulley. Do not allow the tensioner to snap back into position once the belt is off the pulley.
  6. Loosen the alternator retaining bolts, then support the alternator and remove the fasteners. Remove the alternator from the vehicle.

To install:
  1. Position the alternator in the vehicle and loosely install the retaining bolts.
  2. On 1994-98 models, tighten the top alternator bolt to 22 ft. lbs. (30 Nm) and the bottom bolt to 32 ft. lbs. (43 Nm).
  3. On 1999-99 models, tighten the rear bolt to 37 ft. lbs. (50 Nm) and the front bolt to 18 ft. lbs. (25 Nm).
  4. On 1994-98 models, install the alternator brace, then tighten the retaining nut(s) and bolts to 22 ft. lbs. (30 Nm).
  5. On 1999-99 models, install the alternator brace, tighten the brace-to-alternator and brace-to-intake retainers to 18 ft. lbs. (25 Nm). Tighten the brace-to-engine stud nut to 37 ft. lbs. (50 Nm).
  6. Install the battery terminal wire and tighten the retaining nut, then engage the alternator wiring connector.
  7. Hold the serpentine drive belt tensioner, back off the belt while slipping the belt over the alternator pulley. Gradually lower the tensioner into contact with the belt, then check for proper alignment and tension.
  8. Connect the negative battery cable.

Fig. : Alternator mounting-4.3L engine


(Except 2.2L Engine)
  1. Disconnect the negative battery cable.
  2. Remove the air inlet duct assembly, if necessary.
  3. Carefully relieve the serpentine drive belt tension, then remove the belt from the alternator pulley. Do not allow the tensioner to snap back into position once the belt is off the pulley.
  4. Remove the nut retaining the radiator hose brace to the back on the alternator.
  5. If equipped, unfasten the retainers, then remove the brace from the engine and/or the alternator.
  6. Disconnect the battery terminal boot wiring from the back of the alternator, then unplug the regulator wiring connector.
  7. Support the alternator and remove the mounting bolts (usually 2) from either side of the alternator, then remove the alternator from the vehicle.
To install:
  1. Position the alternator in the vehicle and loosely install using the mounting bolts.
  2. If equipped, loosely install the brace to the engine and/or alternator.
  3. Tighten the left or front alternator retaining bolts to 36 ft. lbs. (50 Nm), the right or rear alternator bolt to 18 ft. lbs. (25 Nm), the brace bolt to 18 ft. lbs. (25 Nm) and/or the brace nut to 22 ft. lbs. (30 Nm), as applicable.
  4. Connect and secure the alternator wiring.
  5. Carefully relieve the serpentine drive belt tension and position the belt over the alternator pulley, then slowly release the tensioner into position.
  6. If equipped, install the air inlet duct assembly.
  7. Connect the negative battery cable.

I hope helps with this. Good luck (remember rated this help).

Jan 05, 2010 | 1998 Chevrolet S-10 Pickup

1 Answer

What do I loosen to release and add tension on the serpentine belt for belt replacement on my 1990 Chevy S-10 Blazer with 4.3 liter V6 and AC?

There is a belt tensioning pulley. It's spring loaded and if you put a wrench on the center nut you should be able to remove the tension on the belt...

Nov 20, 2009 | 1990 Chevrolet S-10 Blazer

1 Answer

How do i replace my alternator

Disconnect the possitive and negative battery cables from the battery. Remove the serpentine belt, remove the electrical connection to the alternator then remove the bolts, you may have to have the original pulley removed and then reinstalled on the new alternator.

Jun 24, 2009 | 1999 Chevrolet Blazer

1 Answer

What is the quickest and easist way to replace the alternator and put the serpintine belt back on?

here is step by step instruction on how to replace you alternator. please do not forget to rate and comment abotu your experience with fixya today 3.8L (VIN 1) Supercharged Engines
  1. Disconnect the negative battery cable.
  2. Remove the serpentine drive belt from the alternator, as outlined in Section 1 of this manual.
  3. Detach the electrical connections from the alternator.
  4. Unfasten the alternator mounting bolt and mounting bolt and nut.
  5. Remove the alternator from the vehicle.
    To install:
    1. Position the alternator in the vehicle and secure with the mounting nut and bolt. Tighten to 5 ft. lbs. (8 Nm).
    2. Install the remaining mounting bolt and tighten to 5 ft. lbs. (8 Nm).
    3. Attach the alternator connections. Tighten the output terminal nut to 66 inch lbs. (7.5 Nm).
    4. Install the serpentine drive belt.
    5. Connect the negative battery cable.
3.8L (VIN 3, C & L) Engines
  1. Disconnect the negative battery cable.
  2. Using a suitable breaker bar or ratchet, rotate the tensioner counterclockwise, then remove the serpentine drive belt. For more information regarding serpentine drive belt removal, please refer to Section 1 of this manual.
  3. If necessary, remove the fuel rail cover.
  4. While supporting the alternator, remove the mounting bolts.
  5. Tilt the alternator forward, then label and detach the electrical connectors.
  6. Remove the alternator from the vehicle.
  7. To install:
    1. Support the alternator in position, then install the alternator.
    2. Install the mounting bolts and tighten to 1 ft. lbs. (11 Nm).
    3. Attach the electrical connectors at the back of the alternator. Tighten the alternator output terminal nut to 93 inch lbs. (10.5 Nm) for 1987-92 vehicles, or to 66 inch lbs. (7.5 Nm) for 1993-94 vehicles.
    4. If removed, install the fuel rail cover.
    5. Install the serpentine drive belt and rotate the tensioner into position.
    6. Connect the negative battery cable.

Apr 16, 2009 | 1992 Buick LeSabre

2 Answers

Need to replace alternator in a 1989 chevy s10 blazer

With a serpentine belt, there is a tensioner pulley, so use a socket on a breaker arm placed on the bolt of the tensioner. Turn it until the belt goes slack. It helps to get someone else to hold that in place while you remove the alternator.

Both serpentine and V-belt are described here, and there are diagrams :

Dec 31, 2008 | 1989 Chevrolet S-10 Blazer

1 Answer

Serpentine belt

if you dont have a belt diagram under hood draw a picture of how the belt runs around the pulleys. then put a scoket on tensioner lift to release tension remove belt

Oct 19, 2008 | 1998 Chevrolet S-10 Pickup

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