driving up a hill on the highway my 02 4.3 lost power didnt shift then would not go over 2500 rpm

got a p0101 p0756 p0171 p0174 codes

 

The key here is the MAF sensor DTC and both oxygen sensors showing lean. When these DTC's all show up together, low fuel pressure and or volume is usually the cause. Start by checking the fuel filter for restriction. If that checks OK, follow this link: https://blazerforum.com/forum/2nd-ge...eakdown-88305/