How To Change An Alternator On A 2001 Chevy Blazer

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Replacing the alternator in a Chevy S10 is not a job that must be handled by a professional. If yous take a garage and some feel in the automotive field, this is a job you can practise on your own, saving a plush, and inconvenient, trip to the local mechanic. Follow these steps for how to replace the alternator on a Chevy S10.

Steps

1

Verify whether your Chevy S10 has a faulty alternator.
ii

Access a voltmeter and showtime the truck.

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3
Make contact to the battery with the voltmeter and await for a reading of 14.2. ^[one]
- Presume that the alternator is not properly charging if the reading is below 14, or higher than 14.3.
4
Turn on the lights and the radio. ^[2]
- Recheck the reading on the voltmeter. The accuse shouldn't drop beneath a reading of 13.
5
Depress the gas pedal until the tachometer reads 2000 RPM.
- Recheck the reading on the voltmeter. With the electric devices running and the engine running at 2000 RPM, the voltage should read 14.
half-dozen

Test the wiring if the charges aren't in the proper range, equally the voltage reading alone doesn't fully diagnose a faulty alternator. ^[three]
7

Assure that the vehicle is all the same running.
8

Make contact between the rear of the alternator and the voltmeter and check the reading.
9
Connect the voltmeter to the positive battery anode and check the reading. ^[four]
- Presume that at that place is a trouble with the wiring or circuitry organisation if the readings differ by more than 0.three.
x

Proceed with the post-obit steps when you have confidently diagnosed a bad alternator.
11

Detach the vehicle'due south negative battery line. ^[5]
12

Assure that the bombardment cablevision remains completely separate from the battery throughout the repair procedure.
13

Disengage the serpentine belt from all applicative components.
14

Rotate the belt tensioner counter-clockwise, using an appropriately sized socket wrench. ^[6]
xv

Pull the belt from the pulley when the tensioner is sufficiently loose. ^[vii]
16

Admission the wiring harness, which is attached to the back of the alternator.
17

Dislodge the clench portion of the main connector past pressing on the tab.
18

Pull the primary wire away from the alternator.
19

Remove the nut from the secondary connector. ^[8]
20

Pull the secondary wire abroad from the alternator.
21

Use appropriately sized socket wrenches to dislodge the 3 mounting bolts from the alternator.
22

Lift the alternator away from the engine bay. ^[9]
23

Position the new alternator into the support clamp.
24

Tighten the mounting bolts to the proper torque. ^[x]
25

Reconnect the secondary cable to the alternator past reengaging the nut.
26

Pull dorsum the tab from the primary cable, then reconnect that wire.
27

Push the wire in until the tab locks.
28

Rotate the belt tensioner counter-clockwise once again.
29

Supersede the serpentine belt, referring to the routing guide, which is affixed near the radiator.
30

Reconnect the negative battery line.
31

Start the truck to confirm proper installation.

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Add together New Question

Question

I have an South-10 ii.ii. I want to remove the alternator. There seems to exist an intake shroud and other things mounted above the alternator. How do I remove it?

Y'all may need to remove the bike closest to the alternator, turn the whole linkage organisation for the rotor/hub assembly, and pull it out through the cycle well area. Make sure to accept mom on speed dial in instance anything bad happens.

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Video

Some other faulty components that tin mimic symptoms of a bad alternator can include the battery or the starter.
Information technology is a skillful idea to inspect the serpentine chugalug while it is removed. If you detect whatever cracks or tears on the smooth side, replace it.
If you have the know-how, rebuilding the alternator may be a more affordable culling to replacing it.
An alternator with a loftier charge can cause a lot of problems for your truck'southward sensors and can permanently damage the battery.
If your truck is a late model, refer to your owner's manual regarding the voltage regulator, and how to bypass it in order to check the alternator charge.
The vehicle battery needs to be replaced every v to six years. More than frequent replacement may be indicative of an alternator that is running likewise many volts.

It is non condom to disengage the battery cables while the truck is running to verify a dysfunctional alternator.

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