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Re: 2001 Silverado 1500: volt gage fluctuates
The instrument clusters have an onboard surface mount DC-DC converter circuit and a raft of surface mount pull up and pull down resistors. The solder joints tend to fracture from thermal cycling.
The stepper motor problems are in the 2003-2007 clusters and some of the 2007-2014 clusters as well.
The 1999-2001 clusters used board mounted air core meter movements like the T400 clusters. These are a bit more reliable than the 2003-07 stepper motor gauges.
I'd send the cluster out to be repaired. United Radio has a good reputation.
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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
RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
Last edited by hatzie; 11-20-2022 at 01:29 PM.
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