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Computer Aided Gear Selection At certain RPM's a computer in your transmission will force you to shift from 1st to 4th. It was designed to help with gas mileage.
From: "It's 106 miles to Chicago, we've got a full tank of gas, half a pack of cigarettes, it's dark, and
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-‘18-'19
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Originally Posted by 02MillenniumVette
Computer Aided Gear Selection At certain RPM's a computer in your transmission will force you to shift from 1st to 4th. It was designed to help with gas mileage.
It kept GM from earning the gas guzzler tax on the C5.
It works this way:
1. The engine coolant temp is higher than 120 degree F.
2. Your speed is between 15 - 19 mph
3. You are at 21% throttle or less
It can easily be defeated by shifting at higher RPM's, without purchasing the CAGS Eliminator for about $20.
It kept GM from earning the gas guzzler tax on the C5. 
