GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

  1. Inspect the battery hydrometer.
  2. Remove the INJECTOR Fuse 7 from the IP Junction Block to prevent the engine from starting.
  3. Place the ignition switch in CRANK for 15 seconds.
  4. Using a DMM, measure the voltage between the battery terminals.

Is the measured voltage greater than the specified value?

8 V

Go to Step 2

Go to Step 5

2

Using a DMM, measure the voltage between the negative battery terminal and the engine block while the ignition switch is placed in CRANK for 15 seconds.

Is the measured voltage less than the specified value?

0.5 V

Go to Step 3

Go to Step 7

3

Using a DMM, measure the voltage between the positive battery terminal and the starter solenoid terminal B while the ignition switch is placed in CRANK for 15 seconds.

Is the voltage less than the specified value?

0.5 V

Go to Step 4

Go to Step 8

4

Replace the starter motor. Refer to Starter Motor Replacement .

Is the starter motor replacement complete?

--

Go to Starting System Check

--

5

Perform the parasitic load test. Refer to Battery Electrical Drain/Parasitic Load Test .

Does the battery test OK?

--

Go to Step 6

Go to Step 9

6

Check the battery and starter motor terminals for corrosion or poor contact. Refer to Battery Cable . If OK, replace the starter motor. Refer to Starter Motor Replacement .

Is the repair completed?

--

Go to Starting System Check

--

7

  1. Clean the negative battery cable connections and repeat the test.
  2. If the measured voltage is still greater than the specified value, replace the negative battery cable. Refer to Battery Cable .

Is the repair complete?

0.5 V

Go to Starting System Check

--

8

  1. Clean the positive battery cable connections and repeat the test.
  2. If the measured voltage is still greater than the specified value, replace the positive battery cable. Refer to Battery Cable .

Is the repair complete?

0.5 V

Go to Starting System Check

--

9

Replace the battery. Refer to Battery .

Is the battery replacement complete?

--

Go to Starting System Check

--