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04-17-2005, 09:58 AM
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AF Newbie
Join Date: Nov 2004
Location: Fort Myers, Florida
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1997 Chevy Silverado Z71 5.7....
OBD2 codes P1860 & P1870 .......
Could all reply to what these codes are . We own a 1997 Chevy Silverado w/ a 5.7 - 4 wd....and these codes appeared. Please email ASAP @ nkwaun@webtv.net |
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12-26-2005, 07:35 PM
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#2 | |
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AF Newbie
Join Date: Dec 2005
Location: guilford, Connecticut
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Hi the code P1860 is TCC PWM Solenoid Circuit Electrical. I looked up P1870 if the GM service manual and it indicates that P1870 is Transmission Component Slipping. You may need a valve body due to your TCC regulator valve and bushing wearing out. It is believed that this is mainly due to insufficient fluid changes. Hope this helps fix your problem.
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