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1999 Chev Suburban - Hesitation / Engine Rumble Going Up Hill
We have a low mileage 1999 Subarban 1500 4x4 (60,000k or so). Accelerating up hill (usually steep) can occasionally cause the Burb to start to shudder and slow down. Almost like it missfires on one cylinder, or takes too long to shift down, and cannot recover. The engine warning light comes on and we have to slow way down for a time before it returns to normal. Once it recovers it drives fine. Shop guys can't seem to figure it out. Any suggestions?