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Unifap Code 
Replacement / Starter / Alternator Number
3.378
Pulleys - Alternator
REPLACEMENT CODES
Valeo
SPECIFICATIONS
Number of Grooves
6
Total Diameter (mm)
55.0
Hole Diameter (mm)
17.0
Total Width (mm)
31.0
Keyway
Without Keyway
Alternators
CHEVROLET-GM
VALEO
Application
CHEVROLET-GM
Astra (1.8 / 2.0 / 2.0 MPFi), Corsa (1.0 16V OHC / 1.0 OHC / 1.4 OHC / 1.6 16V OHC / 1.6 OHC), Corsa Pick-Up (1.6 16V OHC / 1.6 OHC), Corsa Sedan (1.0 16V OHC / 1.0 OHC / 1.6 16V OHC / 1.6 OHC), Corsa Wagon (1.0 16V OHC / 1.6 16V OHC / 1.6 OHC), Omega (3.0 / 4.1), S10 (2.0 DLX), Suprema (3.0 / 4.1), Vectra (2.0 / 2.2 / CD 2.2 16V / GLS 2.0 / GSi 2.0 16V)
Technical Support
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