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  1. N

    Allison 5sp: Allison troubleshooting

    Thanks for the info. I’ll look for a different scan tool. The one I used was a diablosport tuner I had for my last 6.0 Silverado ..
  2. N

    Allison 5sp: Allison troubleshooting

    Hey guys. I just picked up a beautiful 2002 2500HD single cab duramax. Was an old man owned truck with 71,000 miles onit. The truck sat for three years without being driven or started. After replacing both batteries, fuel filter, engine oil and the twist on oil filter on the transmission...
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