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po1870 on 4l60e
i have a customer that has a van exactly like my personal van he is getting a code po1870 so we replaced the transmission and still have the same [...] i swaped the transmission out from my van into his he is still getting the po1870 and my van shifts perfectl... Login to read more. 
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| Engine | 4.3 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1999 Chevrolet Astro 4.3L
| Engine | 4.3 L |
| Trans | 4-speed Automatic (Electronic) |
Video