Adam, lots of dealers stayed with Isuzu to do warranty and authorized Isuzu repairs and sell Isuzu parts. Go to www.isuzu.com and enter your zip code to find the nearest Isuzu shops.
When ya have a part #, go to www.myisuzuparts.com and do a part # search to find Isuzu vehicles that share that same part. It looks like a '98-'02 Trooper has the same speed sensor as ours.
Mark
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