Contents Wiring diagrams Section: Charging System All sections

Alternator & Regulator: Other GMC Pickup C2500

Charging System ~109 words

BELT TENSION

ApplicationTension: Lbs. (kg)
All Except Cpmmercial Van & Van(1)
Commercial Van
4.3L, 5.7L & 7.4L
New Belt135 (61.2)
Used Belt (2)90 (40.8)
6.2L Diesel
New Belt146 (66.2)
Used Belt (2)67 (30.4)
Van
4.3L, 5.0L, 5.7L & 7.4L(1)
6.2L Diesel
New Belt146 (66.2)
Used Belt (2)67 (30.4)
(1) Serpentine single belt tension is maintained automatically by a spring tension idler pulley. No adjustment is necessary. (2) A used belt is one that has rotated one or more revolutions.
(1)Serpentine single belt tension is maintained automatically by a spring tension idler pulley. No adjustment is necessary.
(2)A used belt is one that has rotated one or more revolutions.

BELT ADJUSTMENT SPECIFICATIONS

Overcharged Or Undercharged Battery

  1. If an overcharging condition is suspected, run engine at moderate speed. Connect voltmeter across battery terminals. If voltmeter indicates more than 16 volts, replace alternator.
  2. If an undercharging condition is suspected, disconnect 4-wire connector from alternator. Turn ignition on with engine off. Connect a voltmeter between terminal "L" in wiring harness and ground. (Схема №2) Record reading.
  3. If terminal "I" is used, connect voltmeter between terminal "I" and ground. Record reading. If voltmeter reads battery voltage, circuits are okay. If voltmeter reads zero, this indicates an open circuit between terminal checked and battery. Repair as necessary.