The manufacturer is aiming to increase the number of centres across its MasterFit service network from 250 to 400 within the next six months.
The growth in centres should provide fleets with more choice and closer servicing facilities in many cases.
Nigel Griggs, aftersales marketing manager at Vauxhall, said: 'This will help to ensure that we retain the one to three- year-old vehicle parc and regain and attract lost customers in the lucrative four-year-old-plus vehicle service market.
'At present Vauxhall retailers retain more than a third of the latter sector, but with Vauxhall MasterFit spread right across our network, we're confident we can do much better than that.'
Under the Block Exemption rules, a dealer can choose whether to carry out repairs and servicing itself, or sub-contract them to an authorised third party. Alternatively, any repair shop that meets the quality standards set down by the manufacturer can become an authorised repairer, without having to sell cars. The manufacturer cannot limit the number of repairers in any one area and the repairer can work with any number of car makers.
Vauxhall has launched a national campaign to promote its new MasterFit network with a fleet of liveried parts distribution trucks and Griggs is hoping that the increased number of centres will benefit both customers and dealers.
He added: 'By ensuring that we can offer a fast, convenient and competitively-priced service to Vauxhall drivers throughout the country, we are confident we can grow our aftersales business by providing the consumer with a compelling reason for choosing our service brand as opposed to fast-fit companies and other repair operations.'