1988 - 1998 (GMT400) Section for all discussion related to the 1987-1998 Chevrolet and GMC trucks.

lost reverse gear DTC P0751 P1870

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Old Jul 1, 2024 | 1:24 AM
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Default lost reverse gear DTC P0751 P1870

1997 chev truck c1500
2 wheel drive I noticed that. I no longer had reverse later on my check engine light turn on so I looked up codes and are as follows p0751 shift A solenoid and p1870 Trans component slipping looking for advice

Last edited by mountainmanjoe; Jul 1, 2024 at 2:59 AM.
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Old Jul 1, 2024 | 3:01 AM
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How many miles on it? You could try replacing solenoid A, but chances are the trans is just worn out.
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Old Jul 1, 2024 | 7:43 AM
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1057256 miles it's been really well kept never ran hard it's Been in my family since like 20000miles
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Old Jul 1, 2024 | 9:50 AM
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Also would putting new solenoid slove the reverse issue
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Old Jul 1, 2024 | 12:05 PM
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It might. No guarantees.

The other causes are listed here:
https://www.obd-codes.com/p0751
but it might be best to let a trans shop diagnose the issue
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