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Re: battery drain,
.02-.03 after around 20 minutes is fine. That's when the BCM typically goes to sleep.
The BCM should tell the radio to sleep as soon as the key is off and the Driver door is opened. Half an amp to the radio after the door is opened would make me look at the door latch switches.
You need to look at what the TBC fuse feeds and track that down too. 1/10th of an amp will kill the battery overnight.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8
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And please let us know if and how your repairs were successful.
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