C 1500 Truck 2WD V6-4.3L VIN W (1996)
Sit in the vehicle with the doors and windows closed. With the engine running, run the blower on "HIGH"speed with the temperature set for maximum
cooling. Cycle through the blower speeds, modes, and temperature settings to find where the noise does not occur. Try to define the types of noise.
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Noise is constant, but decreases with blower speed deduction. Typical noises are a whine, tick/click, flutter, or scrape.
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Noise is only at start-up or intermittent. This noise may occur at cold ambients and low blower speeds. Typical noise is a squeal/screech.
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Noise is constant at high blower speeds in certain modes, but can be eliminated at lower blower speeds in other modes. Typical noises are a flutter
or rumble.
If the noise persists, remove the blower assembly and check for obstructions or foreign material causing noise and remove. If no obstructions are
found and the noise is still heard, replace the blower assembly.
Without Air Conditioning
